diff --git a/docs/swagger.yaml b/docs/swagger.yaml
index e44d3223c4..b7e6e4a62c 100644
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@@ -627,6 +627,167 @@ paths:
           description: Project ID does not exist.
         '500':
           description: Unexpected internal errors.
+  '/projects/{project_id}/projectmembers':
+    get:
+     summary: Get all project member information
+     description: Get all project member information
+     parameters:
+      - name: project_id
+        in: path
+        type: integer
+        format: int64
+        required: true
+        description: Relevant project ID.
+     tags:
+      - Products
+     responses:
+      '200':
+        description: Get project members successfully.
+        schema:
+          type: array
+          items: 
+            $ref: '#/definitions/ProjectMemberEntity'
+      '400':
+        description: The project id is invalid.
+      '401':
+        description: User need to log in first.
+      '403':
+        description: User in session does not have permission to the project.
+      '404':
+        description: Project ID does not exist.
+      '500':
+        description: Unexpected internal errors.
+    post:
+      summary: Create project member
+      description: >-
+        Create project member relationship, the member can be one of the user_member and group_member, 
+        The user_member need to specify user_id or username. If the user already exist in harbor DB, specify the user_id, 
+        If does not exist in harbor DB, it will SearchAndOnBoard the user.
+        The group_member need to specify id or ldap_group_dn. If the group already exist in harbor DB. specify the user group's id, 
+        If does not exist, it will SearchAndOnBoard the group. 
+      tags:
+       - Products
+      parameters:
+        - name: project_id
+          in: path
+          type: integer
+          format: int64
+          required: true
+          description: Relevant project ID.
+        - name: project_member
+          in: body
+          schema:
+            $ref: '#/definitions/ProjectMember'
+      responses:
+        '201':
+          description: Project member created successfully.
+        '400':
+          description: Illegal format of project member or project id is invalid.
+        '401':
+          description: User need to log in first.
+        '403':
+          description: User in session does not have permission to the project.
+        '404':
+          description: Project does not exist.
+        '500':
+          description: Unexpected internal errors.  
+  '/projects/{project_id}/projectmembers/{mid}':
+    get:
+     summary: Get the project member information
+     description: Get the project member information
+     tags:
+      - Products
+     parameters:
+      - name: project_id
+        in: path
+        type: integer
+        format: int64
+        required: true
+        description: Relevant project ID.
+      - name: mid
+        in: path
+        type: integer
+        format: int64
+        required: true
+        description: The member ID
+     responses:
+        '200':
+          description: Project member retrieved successfully.
+          schema:
+            $ref: '#/definitions/ProjectMemberEntity'
+        '400':
+          description: Illegal format of project member or invalid project id, member id.
+        '401':
+          description: User need to log in first.
+        '403':
+          description: User in session does not have permission to the project.
+        '404':
+          description: Project or projet member does not exist.
+        '500':
+          description: Unexpected internal errors.  
+    put:
+     summary: Update project member
+     description: Update project member relationship
+     tags:
+        - Products
+     parameters:
+      - name: project_id
+        in: path
+        type: integer
+        format: int64
+        required: true
+        description: Relevant project ID.
+      - name: mid
+        in: path
+        type: integer
+        format: int64
+        required: true
+        description: Member ID.  
+      - name: role
+        in: body
+        schema:
+          $ref: '#/definitions/RoleRequest'
+     responses:
+      '200':
+        description: Project member updated successfully.
+      '400':
+        description: Invalid role id, it should be 1,2 or 3, or invalid project id, or invalid member id.
+      '401':
+        description: User need to log in first.
+      '403':
+        description: User in session does not have permission to the project.
+      '404':
+        description: project or project member does not exist.
+      '500':
+        description: Unexpected internal errors.           
+    delete:
+     summary: Delete project member
+     tags:
+      - Products
+     parameters:
+      - name: project_id
+        in: path
+        type: integer
+        format: int64
+        required: true
+        description: Relevant project ID.
+      - name: mid
+        in: path
+        type: integer
+        format: int64
+        required: true
+        description: Member ID.  
+     responses:
+      '200':
+        description: Project member deleted successfully.
+      '400':
+        description: The project id or project member id is invalid.
+      '401':
+        description: User need to log in first.
+      '403':
+        description: User in session does not have permission to the project.
+      '500':
+        description: Unexpected internal errors.  
   /statistics:
     get:
       summary: Get projects number and repositories number relevant to the user
@@ -2307,8 +2468,153 @@ paths:
           $ref: '#/responses/UnsupportedMediaType'
         '500':
           description: Unexpected internal errors.
+  /ldap/groups/search:
+    get:
+      summary: Search available ldap groups.
+      description: >
+        This endpoint searches the available ldap groups based on related
+        configuration parameters. Support searched by input ladp configuration,
+        load configuration from the system and specific filter.
+      parameters:
+        - name: groupname
+          in: query
+          type: string
+          required: false
+          description: Ldap group name
+      tags:
+        - Products
+      responses:
+        '200':
+          description: Search ldap group successfully.
+          schema:
+            type: array
+            items:
+              $ref: '#/definitions/UserGroup'
+        '500':
+          description: Unexpected internal errors.
+  /usergroups:
+   get:
+    summary: Get all user groups information
+    description: Get all user groups information
+    tags:
+     - Products
+    responses:
+      '200':
+        description: Get user group successfully.
+        schema:
+          type: array
+          items:
+            $ref: '#/definitions/UserGroup'
+      '401':
+        description: User need to log in first.
+      '403':
+        description: User in session does not have permission to the user group.
+      '500':
+        description: Unexpected internal errors.      
+   post:
+      summary: Create user group
+      description: Create user group information
+      tags:
+        - Products    
+      parameters:
+        - name: usergroup
+          in: body
+          schema:
+            $ref: '#/definitions/UserGroup'
+      responses:
+        '201':
+          description: User group created successfully.
+        '401':
+          description: User need to log in first.
+        '403':
+          description: User in session does not have permission to the user group.
+        '404':
+          description: The LDAP group is not found.  
+        '409':
+          description: An LDAP user group with same DN already exist. 
+        '500':
+          description: Unexpected internal errors.        
+  /usergroups/{group_id}:
+   get:
+    summary: Get user group information
+    description: Get user group information
+    tags:
+     - Products
+    parameters:
+     - name: group_id
+       in: path
+       type: integer
+       format: int64
+       required: true
+       description: Group ID
+    responses:
+      '200':
+        description: User group get successfully.
+        schema:
+          $ref: '#/definitions/UserGroup'
+      '400':
+        description: The user group id is invalid.
+      '401':
+        description: User need to log in first.
+      '403':
+        description: User in session does not have permission to the user group.
+      '404':
+        description: User group does not exist.
+      '500':
+        description: Unexpected internal errors.  
+   put:
+     summary: Update group information
+     description: Update user group information
+     tags:
+       - Products
+     parameters:
+       - name: group_id
+         in: path
+         type: integer
+         format: int64
+         required: true
+         description: Group ID
+       - name: usergroup
+         in: body
+         required: false
+         schema:
+           $ref: '#/definitions/UserGroup'
+     responses:
+       '200':
+         description: User group updated successfully.
+       '400':
+         description: The user group id is invalid.
+       '401':
+         description: User need to log in first.
+       '403':
+         description: Only admin has this authority.
+       '404':
+         description: User group does not exist.
+       '500':
+         description: Unexpected internal errors.  
+   delete:
+    summary: Delete user group
+    description: Delete user group
+    tags:
+     - Products
+    parameters:
+     - name: group_id
+       type: integer
+       in: path
+       required: true
+    responses:
+      '200':
+        description: User group deleted successfully.
+      '400':
+        description: The user group id is invalid.
+      '401':
+        description: User need to log in first.
+      '403':
+        description: Only admin has this authority.
+      '500':
+        description: Unexpected internal errors.       
   /ldap/users/search:
-    post:
+    get:
       summary: Search available ldap users.
       description: >
         This endpoint searches the available ldap users based on related
@@ -2320,15 +2626,6 @@ paths:
           type: string
           required: false
           description: Registered user ID
-        - name: ldap_conf
-          in: body
-          description: >-
-            ldap search configuration. ldapconf field can input ldap service
-            configuration. If this item are blank, will load default
-            configuration will load current configuration from the system.
-          required: false
-          schema:
-            $ref: '#/definitions/LdapConf'
       tags:
         - Products
       responses:
@@ -2338,14 +2635,10 @@ paths:
             type: array
             items:
               $ref: '#/definitions/LdapUsers'
-        '400':
-          description: Inviald ldap configuration parameters.
         '401':
           description: User need to login first.
         '403':
           description: Only admin has this authority.
-        '415':
-          $ref: '#/responses/UnsupportedMediaType'
         '500':
           description: Unexpected internal errors.
   /ldap/users/import:
@@ -2379,7 +2672,7 @@ paths:
           description: Only admin has this authority.
         '415':
           $ref: '#/responses/UnsupportedMediaType'
-        '500':
+        '404':
           description: Failed import some users.
           schema:
             type: array
@@ -3440,3 +3733,70 @@ definitions:
       update_time:
         type: string
         description: The update time of label.
+  ProjectMemberEntity:
+    type: object
+    properties:
+      id:
+        type: integer
+        description: the project member id
+      project_id:
+        type: integer
+        description: the project id
+      entity_name:
+        type: string
+        description: the name of the group member. 
+      role_name:
+        type: string
+        description: the name of the role
+      role_id: 
+        type: integer
+        description: the role id
+      entity_id: 
+        type: integer
+        description: the id of entity, if the member is an user, it is user_id in user table. if the member is an user group, it is the user group's ID in user_group table.
+      entity_type:
+        type: string
+        description: the entity's type, u for user entity, g for group entity.
+  ProjectMember:
+    type: object
+    properties:
+      role_id:
+        type: integer
+        description: The role id 1 for projectAdmin, 2 for developer, 3 for guest
+      member_user:
+        $ref: '#/definitions/UserEntity'  
+      member_group:
+        $ref: '#/definitions/UserGroup'  
+  RoleRequest:
+    type: object
+    properties:
+      role_id:
+        type: integer
+        description: The role id 1 for projectAdmin, 2 for developer, 3 for guest
+  UserEntity:
+    type: object
+    properties:
+      user_id:
+        type: integer
+        description: The ID of the user.
+      username:
+        type: string
+        description: The name of the user.
+  UserGroup:
+    type: object
+    properties:
+      id:
+        type: integer
+        description: The ID of the user group
+      group_name:
+        type: string
+        description: The name of the user group
+      group_type: 
+        type: integer
+        description: The group type, 1 for LDAP group.
+      ldap_group_dn:
+        type: string
+        description: The DN of the LDAP group if group type is 1 (LDAP group).
+
+
+
diff --git a/src/common/const.go b/src/common/const.go
index 1eba447db5..1d95cb9795 100644
--- a/src/common/const.go
+++ b/src/common/const.go
@@ -106,4 +106,5 @@ const (
 	DefaultJobserviceEndpoint   = "http://jobservice:8080"
 	DefaultUIEndpoint           = "http://ui:8080"
 	DefaultNotaryEndpoint       = "http://notary-server:4443"
+	LdapGroupType               = 1
 )
diff --git a/src/common/dao/group/usergroup.go b/src/common/dao/group/usergroup.go
index 5218a8a970..156db76a39 100644
--- a/src/common/dao/group/usergroup.go
+++ b/src/common/dao/group/usergroup.go
@@ -50,6 +50,10 @@ func QueryUserGroup(query models.UserGroup) ([]*models.UserGroup, error) {
 		sql += ` and ldap_group_dn = ? `
 		sqlParam = append(sqlParam, query.LdapGroupDN)
 	}
+	if query.ID != 0 {
+		sql += ` and id = ? `
+		sqlParam = append(sqlParam, query.ID)
+	}
 	_, err := o.Raw(sql, sqlParam).QueryRows(&groups)
 	if err != nil {
 		return nil, err
@@ -60,12 +64,14 @@ func QueryUserGroup(query models.UserGroup) ([]*models.UserGroup, error) {
 // GetUserGroup ...
 func GetUserGroup(id int) (*models.UserGroup, error) {
 	userGroup := models.UserGroup{ID: id}
-	o := dao.GetOrmer()
-	err := o.Read(&userGroup)
+	userGroupList, err := QueryUserGroup(userGroup)
 	if err != nil {
 		return nil, err
 	}
-	return &userGroup, nil
+	if len(userGroupList) > 0 {
+		return userGroupList[0], nil
+	}
+	return nil, nil
 }
 
 // DeleteUserGroup ...
@@ -92,3 +98,30 @@ func UpdateUserGroupName(id int, groupName string) error {
 	_, err := o.Raw(sql, groupName, id).Exec()
 	return err
 }
+
+// OnBoardUserGroup will check if a usergroup exists in usergroup table, if not insert the usergroup and
+// put the id in the pointer of usergroup model, if it does exist, return the usergroup's profile.
+// This is used for ldap and uaa authentication, such the usergroup can have an ID in Harbor.
+// the keyAttribute and combinedKeyAttribute are key columns used to check duplicate usergroup in harbor
+func OnBoardUserGroup(g *models.UserGroup, keyAttribute string, combinedKeyAttributes ...string) error {
+	o := dao.GetOrmer()
+	created, ID, err := o.ReadOrCreate(g, keyAttribute, combinedKeyAttributes...)
+	if err != nil {
+		return err
+	}
+
+	if created {
+		g.ID = int(ID)
+	} else {
+		prevGroup, err := GetUserGroup(int(ID))
+		if err != nil {
+			return err
+		}
+		g.ID = prevGroup.ID
+		g.GroupName = prevGroup.GroupName
+		g.GroupType = prevGroup.GroupType
+		g.LdapGroupDN = prevGroup.LdapGroupDN
+	}
+
+	return nil
+}
diff --git a/src/common/dao/group/usergroup_test.go b/src/common/dao/group/usergroup_test.go
index 7e65a09d58..c1ad6e4dc4 100644
--- a/src/common/dao/group/usergroup_test.go
+++ b/src/common/dao/group/usergroup_test.go
@@ -19,6 +19,7 @@ import (
 	"os"
 	"testing"
 
+	"github.com/vmware/harbor/src/common"
 	"github.com/vmware/harbor/src/common/dao"
 	"github.com/vmware/harbor/src/common/models"
 	"github.com/vmware/harbor/src/common/utils/log"
@@ -80,7 +81,7 @@ func TestAddUserGroup(t *testing.T) {
 		want    int
 		wantErr bool
 	}{
-		{"Insert an ldap user group", args{userGroup: models.UserGroup{GroupName: "sample_group", GroupType: 1, LdapGroupDN: "sample_ldap_dn_string"}}, 0, false},
+		{"Insert an ldap user group", args{userGroup: models.UserGroup{GroupName: "sample_group", GroupType: common.LdapGroupType, LdapGroupDN: "sample_ldap_dn_string"}}, 0, false},
 		{"Insert other user group", args{userGroup: models.UserGroup{GroupName: "other_group", GroupType: 3, LdapGroupDN: "other information"}}, 0, false},
 	}
 	for _, tt := range tests {
@@ -108,8 +109,8 @@ func TestQueryUserGroup(t *testing.T) {
 		wantErr bool
 	}{
 		{"Query all user group", args{query: models.UserGroup{GroupName: "test_group_01"}}, 1, false},
-		{"Query all ldap group", args{query: models.UserGroup{GroupType: 1}}, 2, false},
-		{"Query ldap group with group property", args{query: models.UserGroup{GroupType: 1, LdapGroupDN: "CN=harbor_users,OU=sample,OU=vmware,DC=harbor,DC=com"}}, 1, false},
+		{"Query all ldap group", args{query: models.UserGroup{GroupType: common.LdapGroupType}}, 2, false},
+		{"Query ldap group with group property", args{query: models.UserGroup{GroupType: common.LdapGroupType, LdapGroupDN: "CN=harbor_users,OU=sample,OU=vmware,DC=harbor,DC=com"}}, 1, false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -126,7 +127,7 @@ func TestQueryUserGroup(t *testing.T) {
 }
 
 func TestGetUserGroup(t *testing.T) {
-	userGroup := models.UserGroup{GroupName: "insert_group", GroupType: 1, LdapGroupDN: "ldap_dn_string"}
+	userGroup := models.UserGroup{GroupName: "insert_group", GroupType: common.LdapGroupType, LdapGroupDN: "ldap_dn_string"}
 	result, err := AddUserGroup(userGroup)
 	if err != nil {
 		t.Errorf("Error occurred when AddUserGroup: %v", err)
@@ -142,6 +143,7 @@ func TestGetUserGroup(t *testing.T) {
 		wantErr bool
 	}{
 		{"Get User Group", args{id: result}, "insert_group", false},
+		{"Get User Group does not exist", args{id: 9999}, "insert_group", false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -150,7 +152,7 @@ func TestGetUserGroup(t *testing.T) {
 				t.Errorf("GetUserGroup() error = %v, wantErr %v", err, tt.wantErr)
 				return
 			}
-			if got.GroupName != tt.want {
+			if got != nil && got.GroupName != tt.want {
 				t.Errorf("GetUserGroup() = %v, want %v", got.GroupName, tt.want)
 			}
 		})
@@ -216,3 +218,34 @@ func TestDeleteUserGroup(t *testing.T) {
 		})
 	}
 }
+
+func TestOnBoardUserGroup(t *testing.T) {
+	type args struct {
+		g *models.UserGroup
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{"OnBoardUserGroup",
+			args{g: &models.UserGroup{
+				GroupName:   "harbor_example",
+				LdapGroupDN: "cn=harbor_example,ou=groups,dc=example,dc=com",
+				GroupType:   common.LdapGroupType}},
+			false},
+		{"OnBoardUserGroup second time",
+			args{g: &models.UserGroup{
+				GroupName:   "harbor_example",
+				LdapGroupDN: "cn=harbor_example,ou=groups,dc=example,dc=com",
+				GroupType:   common.LdapGroupType}},
+			false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := OnBoardUserGroup(tt.args.g, "LdapGroupDN", "GroupType"); (err != nil) != tt.wantErr {
+				t.Errorf("OnBoardUserGroup() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
diff --git a/src/common/dao/project/projectmember.go b/src/common/dao/project/projectmember.go
index 963eb62d68..ba59a0cfde 100644
--- a/src/common/dao/project/projectmember.go
+++ b/src/common/dao/project/projectmember.go
@@ -74,6 +74,7 @@ func GetProjectMember(queryMember models.Member) ([]*models.Member, error) {
 func AddProjectMember(member models.Member) (int, error) {
 
 	log.Debugf("Adding project member %+v", member)
+
 	o := dao.GetOrmer()
 
 	if member.EntityID <= 0 {
@@ -98,9 +99,7 @@ func AddProjectMember(member models.Member) (int, error) {
 
 // UpdateProjectMemberRole updates the record in table project_member, only role can be changed
 func UpdateProjectMemberRole(pmID int, role int) error {
-	if role <= 0 || role >= 3 {
-		return fmt.Errorf("Failed to update project member, role is not in 0,1,2, role:%v", role)
-	}
+
 	o := dao.GetOrmer()
 	sql := "update project_member set role = ? where id = ? "
 	_, err := o.Raw(sql, role, pmID).Exec()
diff --git a/src/common/models/ldap.go b/src/common/models/ldap.go
index 28e09d026e..7d666b3a65 100644
--- a/src/common/models/ldap.go
+++ b/src/common/models/ldap.go
@@ -58,5 +58,5 @@ type LdapFailedImportUser struct {
 // LdapGroup ...
 type LdapGroup struct {
 	GroupName string `json:"group_name,omitempty"`
-	GroupDN   string `json:"group_dn,omitempty"`
+	GroupDN   string `json:"ldap_group_dn,omitempty"`
 }
diff --git a/src/ui/api/harborapi_test.go b/src/ui/api/harborapi_test.go
index df8538b86f..bbbf664d4e 100644
--- a/src/ui/api/harborapi_test.go
+++ b/src/ui/api/harborapi_test.go
@@ -106,9 +106,11 @@ func init() {
 	beego.Router("/api/projects/:id([0-9]+)/metadatas/?:name", &MetadataAPI{}, "get:Get")
 	beego.Router("/api/projects/:id([0-9]+)/metadatas/", &MetadataAPI{}, "post:Post")
 	beego.Router("/api/projects/:id([0-9]+)/metadatas/:name", &MetadataAPI{}, "put:Put;delete:Delete")
+	beego.Router("/api/projects/:pid([0-9]+)/projectmembers/?:pmid([0-9]+)", &ProjectMemberAPI{})
 	beego.Router("/api/repositories", &RepositoryAPI{})
 	beego.Router("/api/statistics", &StatisticAPI{})
 	beego.Router("/api/users/?:id", &UserAPI{})
+	beego.Router("/api/usergroups/?:ugid([0-9]+)", &UserGroupAPI{})
 	beego.Router("/api/logs", &LogAPI{})
 	beego.Router("/api/repositories/*", &RepositoryAPI{}, "put:Put")
 	beego.Router("/api/repositories/*/labels", &RepositoryLabelAPI{}, "get:GetOfRepository;post:AddToRepository")
diff --git a/src/ui/api/ldap.go b/src/ui/api/ldap.go
index 43e1922880..bc4c572cd5 100644
--- a/src/ui/api/ldap.go
+++ b/src/ui/api/ldap.go
@@ -15,7 +15,7 @@
 package api
 
 import (
-	"net/http"
+	"fmt"
 
 	"github.com/vmware/harbor/src/common/models"
 	ldapUtils "github.com/vmware/harbor/src/common/utils/ldap"
@@ -62,8 +62,7 @@ func (l *LdapAPI) Ping() {
 	if string(l.Ctx.Input.RequestBody) == "" {
 		ldapSession, err = ldapUtils.LoadSystemLdapConfig()
 		if err != nil {
-			log.Errorf("Can't load system configuration, error: %v", err)
-			l.RenderError(http.StatusInternalServerError, pingErrorMessage)
+			l.HandleInternalServerError(fmt.Sprintf("Can't load system configuration, error: %v", err))
 			return
 		}
 		err = ldapSession.ConnectionTest()
@@ -73,9 +72,7 @@ func (l *LdapAPI) Ping() {
 	}
 
 	if err != nil {
-		log.Errorf("ldap connect fail, error: %v", err)
-		// do not return any detail information of the error, or may cause SSRF security issue #3755
-		l.RenderError(http.StatusBadRequest, pingErrorMessage)
+		l.HandleInternalServerError(fmt.Sprintf("LDAP connect fail, error: %v", err))
 		return
 	}
 }
@@ -84,24 +81,9 @@ func (l *LdapAPI) Ping() {
 func (l *LdapAPI) Search() {
 	var err error
 	var ldapUsers []models.LdapUser
-	var ldapConfs models.LdapConf
-	var ldapSession *ldapUtils.Session
-	l.Ctx.Input.CopyBody(1 << 32)
-	if string(l.Ctx.Input.RequestBody) == "" {
-		ldapSession, err = ldapUtils.LoadSystemLdapConfig()
-		if err != nil {
-			log.Errorf("can't load system configuration, error: %v", err)
-			l.RenderError(http.StatusInternalServerError, loadSystemErrorMessage)
-			return
-		}
-	} else {
-		l.DecodeJSONReqAndValidate(&ldapConfs)
-		ldapSession, err = ldapUtils.CreateWithConfig(ldapConfs)
-	}
-
+	ldapSession, err := ldapUtils.LoadSystemLdapConfig()
 	if err = ldapSession.Open(); err != nil {
-		log.Errorf("can't Open ldap session, error: %v", err)
-		l.RenderError(http.StatusInternalServerError, canNotOpenLdapSession)
+		l.HandleInternalServerError(fmt.Sprintf("Can't Open LDAP session, error: %v", err))
 		return
 	}
 	defer ldapSession.Close()
@@ -111,8 +93,7 @@ func (l *LdapAPI) Search() {
 	ldapUsers, err = ldapSession.SearchUser(searchName)
 
 	if err != nil {
-		log.Errorf("Ldap search fail, error: %v", err)
-		l.RenderError(http.StatusBadRequest, searchLdapFailMessage)
+		l.HandleInternalServerError(fmt.Sprintf("LDAP search fail, error: %v", err))
 		return
 	}
 
@@ -132,14 +113,12 @@ func (l *LdapAPI) ImportUser() {
 	ldapFailedImportUsers, err := importUsers(ldapConfs, ldapImportUsers.LdapUIDList)
 
 	if err != nil {
-		log.Errorf("Ldap import user fail, error: %v", err)
-		l.RenderError(http.StatusBadRequest, importUserError)
+		l.HandleInternalServerError(fmt.Sprintf("LDAP import user fail, error: %v", err))
 		return
 	}
 
 	if len(ldapFailedImportUsers) > 0 {
-		log.Errorf("Import ldap user have internal error")
-		l.RenderError(http.StatusInternalServerError, importUserError)
+		l.HandleNotFound("Import LDAP user have internal error")
 		l.Data["json"] = ldapFailedImportUsers
 		l.ServeJSON()
 		return
@@ -153,12 +132,12 @@ func importUsers(ldapConfs models.LdapConf, ldapImportUsers []string) ([]models.
 
 	ldapSession, err := ldapUtils.LoadSystemLdapConfig()
 	if err != nil {
-		log.Errorf("can't load system configuration, error: %v", err)
+		log.Errorf("Can't load system configuration, error: %v", err)
 		return nil, err
 	}
 
 	if err = ldapSession.Open(); err != nil {
-		log.Errorf("Can't connect to ldap, error: %v", err)
+		log.Errorf("Can't connect to LDAP, error: %v", err)
 	}
 	defer ldapSession.Close()
 
@@ -182,7 +161,7 @@ func importUsers(ldapConfs models.LdapConf, ldapImportUsers []string) ([]models.
 			u.UID = tempUID
 			u.Error = "failed_search_user"
 			failedImportUser = append(failedImportUser, u)
-			log.Errorf("Invalid ldap search request for %s, error: %v", tempUID, err)
+			log.Errorf("Invalid LDAP search request for %s, error: %v", tempUID, err)
 			continue
 		}
 
@@ -211,3 +190,22 @@ func importUsers(ldapConfs models.LdapConf, ldapImportUsers []string) ([]models.
 
 	return failedImportUser, nil
 }
+
+// SearchGroup ... Search LDAP by groupname
+func (l *LdapAPI) SearchGroup() {
+	searchName := l.GetString("groupname")
+	ldapSession, err := ldapUtils.LoadSystemLdapConfig()
+	if err != nil {
+		l.HandleInternalServerError(fmt.Sprintf("Can't get LDAP system config, error: %v", err))
+		return
+	}
+	ldapSession.Open()
+	defer ldapSession.Close()
+	ldapGroups, err := ldapSession.SearchGroupByName(searchName)
+	if err != nil {
+		l.HandleInternalServerError(fmt.Sprintf("Can't search LDAP group by name, error: %v", err))
+		return
+	}
+	l.Data["json"] = ldapGroups
+	l.ServeJSON()
+}
diff --git a/src/ui/api/projectmember.go b/src/ui/api/projectmember.go
new file mode 100644
index 0000000000..fd38136991
--- /dev/null
+++ b/src/ui/api/projectmember.go
@@ -0,0 +1,206 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/vmware/harbor/src/common"
+	"github.com/vmware/harbor/src/common/dao/project"
+	"github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/ui/auth"
+)
+
+// ProjectMemberAPI handles request to /api/projects/{}/members/{}
+type ProjectMemberAPI struct {
+	BaseController
+	id         int
+	entityID   int
+	entityType string
+	project    *models.Project
+}
+
+// Prepare validates the URL and parms
+func (pma *ProjectMemberAPI) Prepare() {
+	pma.BaseController.Prepare()
+
+	if !pma.SecurityCtx.IsAuthenticated() {
+		pma.HandleUnauthorized()
+		return
+	}
+	pid, err := pma.GetInt64FromPath(":pid")
+	if err != nil || pid <= 0 {
+		text := "invalid project ID: "
+		if err != nil {
+			text += err.Error()
+		} else {
+			text += fmt.Sprintf("%d", pid)
+		}
+		pma.HandleBadRequest(text)
+		return
+	}
+	project, err := pma.ProjectMgr.Get(pid)
+	if err != nil {
+		pma.ParseAndHandleError(fmt.Sprintf("failed to get project %d", pid), err)
+		return
+	}
+	if project == nil {
+		pma.HandleNotFound(fmt.Sprintf("project %d not found", pid))
+		return
+	}
+	pma.project = project
+
+	if !(pma.Ctx.Input.IsGet() && pma.SecurityCtx.HasReadPerm(pid) ||
+		pma.SecurityCtx.HasAllPerm(pid)) {
+		pma.HandleForbidden(pma.SecurityCtx.GetUsername())
+		return
+	}
+
+	pmid, err := pma.GetInt64FromPath(":pmid")
+	if err != nil {
+		log.Errorf("Failed to get pmid from path, error %v", err)
+	}
+	if pmid <= 0 && (pma.Ctx.Input.IsPut() || pma.Ctx.Input.IsDelete()) {
+		pma.HandleBadRequest(fmt.Sprintf("The project member id is invalid, pmid:%s", pma.GetStringFromPath(":pmid")))
+		return
+	}
+	pma.id = int(pmid)
+}
+
+//Get ...
+func (pma *ProjectMemberAPI) Get() {
+	projectID := pma.project.ProjectID
+	queryMember := models.Member{}
+	queryMember.ProjectID = projectID
+	pma.Data["json"] = make([]models.Member, 0)
+	if pma.id == 0 {
+		//member id not set, return all member of current project
+		memberList, err := project.GetProjectMember(queryMember)
+		if err != nil {
+			pma.HandleInternalServerError(fmt.Sprintf("Failed to query database for member list, error: %v", err))
+			return
+		}
+		if len(memberList) > 0 {
+			pma.Data["json"] = memberList
+		}
+	} else {
+		//return a specific member
+		queryMember.ID = pma.id
+		memberList, err := project.GetProjectMember(queryMember)
+		if err != nil {
+			pma.HandleInternalServerError(fmt.Sprintf("Failed to query database for member list, error: %v", err))
+			return
+		}
+		if len(memberList) == 0 {
+			pma.HandleNotFound(fmt.Sprintf("The project member does not exit, pmid:%v", pma.id))
+			return
+		}
+		pma.Data["json"] = memberList[0]
+	}
+	pma.ServeJSON()
+}
+
+// Post ... Add a project member
+func (pma *ProjectMemberAPI) Post() {
+	projectID := pma.project.ProjectID
+	var request models.MemberReq
+	pma.DecodeJSONReq(&request)
+	pmid, err := AddOrUpdateProjectMember(projectID, request)
+	if err != nil {
+		pma.HandleInternalServerError(fmt.Sprintf("Failed to add project member, error: %v", err))
+		return
+	}
+	pma.Redirect(http.StatusCreated, strconv.FormatInt(int64(pmid), 10))
+}
+
+// Put ... Update an exist project member
+func (pma *ProjectMemberAPI) Put() {
+	pid := pma.project.ProjectID
+	pmID := pma.id
+	var req models.Member
+	pma.DecodeJSONReq(&req)
+	if req.Role < 1 || req.Role > 3 {
+		pma.HandleBadRequest(fmt.Sprintf("Invalid role id %v", req.Role))
+		return
+	}
+	err := project.UpdateProjectMemberRole(pmID, req.Role)
+	if err != nil {
+		pma.HandleInternalServerError(fmt.Sprintf("Failed to update DB to add project user role, project id: %d, pmid : %d, role id: %d", pid, pmID, req.Role))
+		return
+	}
+}
+
+// Delete ...
+func (pma *ProjectMemberAPI) Delete() {
+	pmid := pma.id
+	err := project.DeleteProjectMemberByID(pmid)
+	if err != nil {
+		pma.HandleInternalServerError(fmt.Sprintf("Failed to delete project roles for user, project member id: %d, error: %v", pmid, err))
+		return
+	}
+}
+
+// AddOrUpdateProjectMember ... If the project member relationship does not exist, create it. if exist, update it
+func AddOrUpdateProjectMember(projectID int64, request models.MemberReq) (int, error) {
+	var member models.Member
+	member.ProjectID = projectID
+	member.Role = request.Role
+	if request.MemberUser.UserID > 0 {
+		member.EntityID = request.MemberUser.UserID
+		member.EntityType = common.UserMember
+	} else if request.MemberGroup.ID > 0 {
+		member.EntityID = request.MemberGroup.ID
+		member.EntityType = common.GroupMember
+	} else if len(request.MemberUser.Username) > 0 {
+		member.EntityType = common.UserMember
+		userID, err := auth.SearchAndOnBoardUser(request.MemberUser.Username)
+		if err != nil {
+			return 0, err
+		}
+		member.EntityID = userID
+	} else if len(request.MemberGroup.LdapGroupDN) > 0 {
+		member.EntityType = common.GroupMember
+		//If groupname provided, use the provided groupname
+		//If ldap group already exist in harbor, use the previous group name
+		groupID, err := auth.SearchAndOnBoardGroup(request.MemberGroup.LdapGroupDN, request.MemberGroup.GroupName)
+		if err != nil {
+			return 0, err
+		}
+		member.EntityID = groupID
+	}
+	if member.EntityID <= 0 {
+		return 0, fmt.Errorf("Can not get valid member entity, request: %+v", request)
+	}
+	memberList, err := project.GetProjectMember(models.Member{
+		ProjectID:  member.ProjectID,
+		EntityID:   member.EntityID,
+		EntityType: member.EntityType,
+	})
+	if err != nil {
+		return 0, err
+	}
+	if len(memberList) > 0 {
+		project.UpdateProjectMemberRole(memberList[0].ID, member.Role)
+		return 0, nil
+	}
+
+	if member.Role < 1 || member.Role > 3 {
+		return 0, fmt.Errorf("Failed to update project member, role is not in 1,2,3 role:%v", member.Role)
+	}
+	return project.AddProjectMember(member)
+}
diff --git a/src/ui/api/projectmember_test.go b/src/ui/api/projectmember_test.go
new file mode 100644
index 0000000000..3b72d5a24b
--- /dev/null
+++ b/src/ui/api/projectmember_test.go
@@ -0,0 +1,210 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/dao/project"
+	"github.com/vmware/harbor/src/common/models"
+)
+
+func TestProjectMemberAPI_Get(t *testing.T) {
+	cases := []*codeCheckingCase{
+		// 401
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodGet,
+				url:    "/api/projects/1/projectmembers",
+			},
+			code: http.StatusUnauthorized,
+		},
+		//200
+		&codeCheckingCase{
+			request: &testingRequest{
+				method:     http.MethodGet,
+				url:        "/api/projects/1/projectmembers",
+				credential: admin,
+			},
+			code: http.StatusOK,
+		},
+		//400
+		&codeCheckingCase{
+			request: &testingRequest{
+				method:     http.MethodGet,
+				url:        "/api/projects/0/projectmembers",
+				credential: admin,
+			},
+			code: http.StatusBadRequest,
+		},
+		// 404
+		&codeCheckingCase{
+			request: &testingRequest{
+				method:     http.MethodGet,
+				url:        "/api/projects/1/projectmembers/121",
+				credential: admin,
+			},
+			code: http.StatusNotFound,
+		},
+	}
+	runCodeCheckingCases(t, cases...)
+}
+
+func TestProjectMemberAPI_Post(t *testing.T) {
+	userID, err := dao.Register(models.User{
+		Username: "restuser",
+		Password: "Harbor12345",
+		Email:    "restuser@example.com",
+	})
+	defer dao.DeleteUser(int(userID))
+	if err != nil {
+		t.Errorf("Error occurred when create user: %v", err)
+	}
+
+	cases := []*codeCheckingCase{
+		// 401
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPost,
+				url:    "/api/projects/1/projectmembers",
+				bodyJSON: &models.MemberReq{
+					Role: 1,
+					MemberUser: models.User{
+						UserID: int(userID),
+					},
+				},
+			},
+			code: http.StatusUnauthorized,
+		},
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPost,
+				url:    "/api/projects/1/projectmembers",
+				bodyJSON: &models.MemberReq{
+					Role: 1,
+					MemberUser: models.User{
+						UserID: int(userID),
+					},
+				},
+				credential: admin,
+			},
+			code: http.StatusCreated,
+		},
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPost,
+				url:    "/api/projects/1/projectmembers",
+				bodyJSON: &models.MemberReq{
+					Role: 1,
+					MemberUser: models.User{
+						UserID: 0,
+					},
+				},
+				credential: admin,
+			},
+			code: http.StatusInternalServerError,
+		},
+	}
+	runCodeCheckingCases(t, cases...)
+}
+
+func TestProjectMemberAPI_PutAndDelete(t *testing.T) {
+
+	userID, err := dao.Register(models.User{
+		Username: "restuser",
+		Password: "Harbor12345",
+		Email:    "restuser@example.com",
+	})
+	defer dao.DeleteUser(int(userID))
+	if err != nil {
+		t.Errorf("Error occurred when create user: %v", err)
+	}
+
+	ID, err := project.AddProjectMember(models.Member{
+		ProjectID:  1,
+		Role:       1,
+		EntityID:   int(userID),
+		EntityType: "u",
+	})
+	if err != nil {
+		t.Errorf("Error occurred when add project member: %v", err)
+	}
+	URL := fmt.Sprintf("/api/projects/1/projectmembers/%v", ID)
+	badURL := fmt.Sprintf("/api/projects/1/projectmembers/%v", 0)
+	cases := []*codeCheckingCase{
+		// 401
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPut,
+				url:    URL,
+				bodyJSON: &models.Member{
+					Role: 2,
+				},
+			},
+			code: http.StatusUnauthorized,
+		},
+		// 200
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPut,
+				url:    URL,
+				bodyJSON: &models.Member{
+					Role: 2,
+				},
+				credential: admin,
+			},
+			code: http.StatusOK,
+		},
+		// 400
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPut,
+				url:    badURL,
+				bodyJSON: &models.Member{
+					Role: 2,
+				},
+				credential: admin,
+			},
+			code: http.StatusBadRequest,
+		},
+		// 400
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPut,
+				url:    URL,
+				bodyJSON: &models.Member{
+					Role: -2,
+				},
+				credential: admin,
+			},
+			code: http.StatusBadRequest,
+		},
+		// 200
+		&codeCheckingCase{
+			request: &testingRequest{
+				method:     http.MethodDelete,
+				url:        URL,
+				credential: admin,
+			},
+			code: http.StatusOK,
+		},
+	}
+
+	runCodeCheckingCases(t, cases...)
+
+}
diff --git a/src/ui/api/usergroup.go b/src/ui/api/usergroup.go
new file mode 100644
index 0000000000..4645b9b0f8
--- /dev/null
+++ b/src/ui/api/usergroup.go
@@ -0,0 +1,146 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/vmware/harbor/src/common"
+	"github.com/vmware/harbor/src/common/dao/group"
+	"github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/ui/auth"
+)
+
+// UserGroupAPI ...
+type UserGroupAPI struct {
+	BaseController
+	id int
+}
+
+// Prepare validates the URL and parms
+func (uga *UserGroupAPI) Prepare() {
+	uga.BaseController.Prepare()
+	if !uga.SecurityCtx.IsAuthenticated() {
+		uga.HandleUnauthorized()
+		return
+	}
+
+	ugid, err := uga.GetInt64FromPath(":ugid")
+	if err != nil {
+		log.Warningf("failed to parse user group id, error: %v", err)
+	}
+	if ugid <= 0 && (uga.Ctx.Input.IsPut() || uga.Ctx.Input.IsDelete()) {
+		uga.HandleBadRequest(fmt.Sprintf("invalid user group ID: %s", uga.GetStringFromPath(":ugid")))
+		return
+	}
+	uga.id = int(ugid)
+	//Common user can create/update, only harbor admin can delete user group.
+	if uga.Ctx.Input.IsDelete() && !uga.SecurityCtx.IsSysAdmin() {
+		uga.HandleForbidden(uga.SecurityCtx.GetUsername())
+		return
+	}
+}
+
+// Get ...
+func (uga *UserGroupAPI) Get() {
+	ID := uga.id
+	uga.Data["json"] = make([]models.UserGroup, 0)
+	if ID == 0 {
+		//user group id not set, return all user group
+		query := models.UserGroup{GroupType: common.LdapGroupType} //Current query LDAP group only
+		userGroupList, err := group.QueryUserGroup(query)
+		if err != nil {
+			uga.HandleInternalServerError(fmt.Sprintf("Failed to query database for user group list, error: %v", err))
+			return
+		}
+		if len(userGroupList) > 0 {
+			uga.Data["json"] = userGroupList
+		}
+	} else {
+		//return a specific user group
+		userGroup, err := group.GetUserGroup(ID)
+		if userGroup == nil {
+			uga.HandleNotFound("The user group does not exist.")
+			return
+		}
+		if err != nil {
+			uga.HandleInternalServerError(fmt.Sprintf("Failed to query database for user group list, error: %v", err))
+			return
+		}
+		uga.Data["json"] = userGroup
+	}
+	uga.ServeJSON()
+}
+
+// Post ... Create User Group
+func (uga *UserGroupAPI) Post() {
+	userGroup := models.UserGroup{}
+	uga.DecodeJSONReq(&userGroup)
+	userGroup.ID = 0
+	userGroup.GroupType = common.LdapGroupType
+	query := models.UserGroup{GroupType: userGroup.GroupType, LdapGroupDN: userGroup.LdapGroupDN}
+	result, err := group.QueryUserGroup(query)
+	if err != nil {
+		uga.HandleInternalServerError(fmt.Sprintf("Error occurred in add user group, error: %v", err))
+		return
+	}
+	if len(result) > 0 {
+		uga.HandleConflict("Error occurred in add user group, duplicate user group exist.")
+	}
+	// User can not add ldap group when the ldap server is offline
+	ldapGroup, err := auth.SearchGroup(userGroup.LdapGroupDN)
+	if err != nil {
+		uga.HandleInternalServerError(fmt.Sprintf("Error occurred in search user group. error: %v", err))
+		return
+	}
+	if ldapGroup == nil {
+		uga.HandleNotFound("The LDAP group is not found")
+		return
+	}
+	groupID, err := group.AddUserGroup(userGroup)
+	if err != nil {
+		uga.HandleInternalServerError(fmt.Sprintf("Error occurred in add user group, error: %v", err))
+		return
+	}
+	uga.Redirect(http.StatusCreated, strconv.FormatInt(int64(groupID), 10))
+}
+
+// Put ... Only support update name
+func (uga *UserGroupAPI) Put() {
+	userGroup := models.UserGroup{}
+	uga.DecodeJSONReq(&userGroup)
+	ID := uga.id
+	userGroup.GroupType = common.LdapGroupType
+	log.Debugf("Updated user group %v", userGroup)
+	err := group.UpdateUserGroupName(ID, userGroup.GroupName)
+	if err != nil {
+		uga.HandleInternalServerError(fmt.Sprintf("Error occurred in update user group, error: %v", err))
+		return
+	}
+	return
+}
+
+// Delete ...
+func (uga *UserGroupAPI) Delete() {
+	err := group.DeleteUserGroup(uga.id)
+	if err != nil {
+		uga.HandleInternalServerError(fmt.Sprintf("Error occurred in update user group, error: %v", err))
+		return
+	}
+	return
+}
diff --git a/src/ui/api/usergroup_test.go b/src/ui/api/usergroup_test.go
new file mode 100644
index 0000000000..d160a0977e
--- /dev/null
+++ b/src/ui/api/usergroup_test.go
@@ -0,0 +1,154 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/vmware/harbor/src/common"
+
+	"github.com/vmware/harbor/src/common/dao/group"
+
+	"github.com/vmware/harbor/src/common/models"
+)
+
+const (
+	URL = "/api/usergroups"
+)
+
+func TestUserGroupAPI_GetAndDelete(t *testing.T) {
+
+	groupID, err := group.AddUserGroup(models.UserGroup{
+		GroupName:   "harbor_users",
+		LdapGroupDN: "cn=harbor_users,ou=groups,dc=example,dc=com",
+		GroupType:   common.LdapGroupType,
+	})
+
+	if err != nil {
+		t.Errorf("Error occurred when AddUserGroup: %v", err)
+	}
+	defer group.DeleteUserGroup(groupID)
+	cases := []*codeCheckingCase{
+		// 401
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodGet,
+				url:    URL,
+			},
+			code: http.StatusUnauthorized,
+		},
+
+		// 200
+		&codeCheckingCase{
+			request: &testingRequest{
+				method:     http.MethodGet,
+				url:        fmt.Sprintf("/api/usergroups/%d", groupID),
+				credential: admin,
+			},
+			code: http.StatusOK,
+		},
+		// 200
+		&codeCheckingCase{
+			request: &testingRequest{
+				method:     http.MethodGet,
+				url:        fmt.Sprintf("/api/usergroups"),
+				credential: admin,
+			},
+			code: http.StatusOK,
+		},
+		// 200
+		&codeCheckingCase{
+			request: &testingRequest{
+				method:     http.MethodDelete,
+				url:        fmt.Sprintf("/api/usergroups/%d", groupID),
+				credential: admin,
+			},
+			code: http.StatusOK,
+		},
+	}
+
+	runCodeCheckingCases(t, cases...)
+}
+
+func TestUserGroupAPI_Post(t *testing.T) {
+	groupID, err := group.AddUserGroup(models.UserGroup{
+		GroupName:   "harbor_group",
+		LdapGroupDN: "cn=harbor_group,ou=groups,dc=example,dc=com",
+		GroupType:   common.LdapGroupType,
+	})
+	if err != nil {
+		t.Errorf("Error occurred when AddUserGroup: %v", err)
+	}
+	defer group.DeleteUserGroup(groupID)
+
+	cases := []*codeCheckingCase{
+		//409
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPost,
+				url:    "/api/usergroups",
+				bodyJSON: &models.UserGroup{
+					GroupName:   "harbor_group",
+					LdapGroupDN: "cn=harbor_group,ou=groups,dc=example,dc=com",
+					GroupType:   common.LdapGroupType,
+				},
+				credential: admin,
+			},
+			code: http.StatusConflict,
+		},
+	}
+	runCodeCheckingCases(t, cases...)
+}
+
+func TestUserGroupAPI_Put(t *testing.T) {
+	groupID, err := group.AddUserGroup(models.UserGroup{
+		GroupName:   "harbor_group",
+		LdapGroupDN: "cn=harbor_groups,ou=groups,dc=example,dc=com",
+		GroupType:   common.LdapGroupType,
+	})
+	defer group.DeleteUserGroup(groupID)
+
+	if err != nil {
+		t.Errorf("Error occurred when AddUserGroup: %v", err)
+	}
+	cases := []*codeCheckingCase{
+		//401
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPut,
+				url:    fmt.Sprintf("/api/usergroups/%d", groupID),
+				bodyJSON: &models.UserGroup{
+					GroupName: "my_group",
+				},
+			},
+			code: http.StatusUnauthorized,
+		},
+		//200
+		&codeCheckingCase{
+			request: &testingRequest{
+				method: http.MethodPut,
+				url:    fmt.Sprintf("/api/usergroups/%d", groupID),
+				bodyJSON: &models.UserGroup{
+					GroupName: "my_group",
+				},
+				credential: admin,
+			},
+			code: http.StatusOK,
+		},
+	}
+	runCodeCheckingCases(t, cases...)
+}
diff --git a/src/ui/auth/auth_test.go b/src/ui/auth/auth_test.go
index fe93018c20..9998d552ea 100644
--- a/src/ui/auth/auth_test.go
+++ b/src/ui/auth/auth_test.go
@@ -68,7 +68,7 @@ func TestDefaultAuthenticate(t *testing.T) {
 	authHelper := DefaultAuthenticateHelper{}
 	m := models.AuthModel{}
 	user, err := authHelper.Authenticate(m)
-	if user != nil || err != nil {
+	if user != nil || err == nil {
 		t.Fatal("Default implementation should return nil")
 	}
 }
@@ -77,8 +77,26 @@ func TestDefaultOnBoardUser(t *testing.T) {
 	user := &models.User{}
 	authHelper := DefaultAuthenticateHelper{}
 	err := authHelper.OnBoardUser(user)
-	if err != nil {
-		t.Fatal("Default implementation should return nil")
+	if err == nil {
+		t.Fatal("Default implementation should return error")
+	}
+}
+
+func TestDefaultMethods(t *testing.T) {
+	authHelper := DefaultAuthenticateHelper{}
+	_, err := authHelper.SearchUser("sample")
+	if err == nil {
+		t.Fatal("Default implementation should return error")
+	}
+
+	_, err = authHelper.SearchGroup("sample")
+	if err == nil {
+		t.Fatal("Default implementation should return error")
+	}
+
+	err = authHelper.OnBoardGroup(&models.UserGroup{}, "sample")
+	if err == nil {
+		t.Fatal("Default implementation should return error")
 	}
 }
 
diff --git a/src/ui/auth/authenticator.go b/src/ui/auth/authenticator.go
index f7f8230ccc..9ac7e88530 100644
--- a/src/ui/auth/authenticator.go
+++ b/src/ui/auth/authenticator.go
@@ -15,6 +15,7 @@
 package auth
 
 import (
+	"errors"
 	"fmt"
 	"time"
 
@@ -55,9 +56,13 @@ type AuthenticateHelper interface {
 	// put the id in the pointer of user model, if it does exist, fill in the user model based
 	// on the data record of the user
 	OnBoardUser(u *models.User) error
+	// Create a group in harbor DB, if altGroupName is not empty, take the altGroupName as groupName in harbor DB.
+	OnBoardGroup(g *models.UserGroup, altGroupName string) error
 	// Get user information from account repository
 	SearchUser(username string) (*models.User, error)
-	// Update user information after authenticate, such as Onboard or sync info etc
+	// Search a group based on specific authentication
+	SearchGroup(groupDN string) (*models.UserGroup, error)
+	// Update user information after authenticate, such as OnBoard or sync info etc
 	PostAuthenticate(u *models.User) error
 }
 
@@ -67,26 +72,36 @@ type DefaultAuthenticateHelper struct {
 
 // Authenticate ...
 func (d *DefaultAuthenticateHelper) Authenticate(m models.AuthModel) (*models.User, error) {
-	return nil, nil
+	return nil, errors.New("Not supported")
 }
 
 // OnBoardUser will check if a user exists in user table, if not insert the user and
 // put the id in the pointer of user model, if it does exist, fill in the user model based
 // on the data record of the user
 func (d *DefaultAuthenticateHelper) OnBoardUser(u *models.User) error {
-	return nil
+	return errors.New("Not supported")
 }
 
 //SearchUser - Get user information from account repository
 func (d *DefaultAuthenticateHelper) SearchUser(username string) (*models.User, error) {
-	return nil, nil
+	return nil, errors.New("Not supported")
 }
 
-//PostAuthenticate - Update user information after authenticate, such as Onboard or sync info etc
+//PostAuthenticate - Update user information after authenticate, such as OnBoard or sync info etc
 func (d *DefaultAuthenticateHelper) PostAuthenticate(u *models.User) error {
 	return nil
 }
 
+// OnBoardGroup - OnBoardGroup, it will set the ID of the user group, if altGroupName is not empty, take the altGroupName as groupName in harbor DB.
+func (d *DefaultAuthenticateHelper) OnBoardGroup(u *models.UserGroup, altGroupName string) error {
+	return errors.New("Not supported")
+}
+
+// SearchGroup - Search ldap group by group key, groupKey is the unique attribute of group in authenticator, for LDAP, the key is group DN
+func (d *DefaultAuthenticateHelper) SearchGroup(groupKey string) (*models.UserGroup, error) {
+	return nil, errors.New("Not supported")
+}
+
 var registry = make(map[string]AuthenticateHelper)
 
 // Register add different authenticators to registry map.
@@ -128,9 +143,7 @@ func Login(m models.AuthModel) (*models.User, error) {
 		}
 		return nil, err
 	}
-
 	err = authenticator.PostAuthenticate(user)
-
 	return user, err
 }
 
@@ -166,6 +179,51 @@ func SearchUser(username string) (*models.User, error) {
 	return helper.SearchUser(username)
 }
 
+// OnBoardGroup - Create a user group in harbor db, if altGroupName is not empty, take the altGroupName as groupName in harbor DB
+func OnBoardGroup(userGroup *models.UserGroup, altGroupName string) error {
+	helper, err := getHelper()
+	if err != nil {
+		return err
+	}
+	return helper.OnBoardGroup(userGroup, altGroupName)
+}
+
+// SearchGroup -- Search group in authenticator, groupKey is the unique attribute of group in authenticator, for LDAP, the key is group DN
+func SearchGroup(groupKey string) (*models.UserGroup, error) {
+	helper, err := getHelper()
+	if err != nil {
+		return nil, err
+	}
+	return helper.SearchGroup(groupKey)
+}
+
+// SearchAndOnBoardUser ... Search user and OnBoard user, if user exist, return the ID of current user.
+func SearchAndOnBoardUser(username string) (int, error) {
+	user, err := SearchUser(username)
+	if err != nil {
+		return 0, err
+	}
+	if user != nil {
+		err = OnBoardUser(user)
+		if err != nil {
+			return 0, err
+		}
+	}
+	return user.UserID, nil
+}
+
+// SearchAndOnBoardGroup ... if altGroupName is not empty, take the altGroupName as groupName in harbor DB
+func SearchAndOnBoardGroup(groupKey, altGroupName string) (int, error) {
+	userGroup, err := SearchGroup(groupKey)
+	if err != nil {
+		return 0, err
+	}
+	if userGroup != nil {
+		err = OnBoardGroup(userGroup, altGroupName)
+	}
+	return userGroup.ID, err
+}
+
 // PostAuthenticate -
 func PostAuthenticate(u *models.User) error {
 	helper, err := getHelper()
diff --git a/src/ui/auth/db/db_test.go b/src/ui/auth/db/db_test.go
index 246e1b650c..c49c4d5532 100644
--- a/src/ui/auth/db/db_test.go
+++ b/src/ui/auth/db/db_test.go
@@ -126,7 +126,7 @@ func TestSearchUser(t *testing.T) {
 
 }
 
-func TestAuthenticateHelperOnboardUser(t *testing.T) {
+func TestAuthenticateHelperOnBoardUser(t *testing.T) {
 	user := models.User{
 		Username: "test01",
 		Realname: "test01",
diff --git a/src/ui/auth/ldap/ldap.go b/src/ui/auth/ldap/ldap.go
index 5fd03e16b3..6d114a66bb 100644
--- a/src/ui/auth/ldap/ldap.go
+++ b/src/ui/auth/ldap/ldap.go
@@ -19,7 +19,10 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/vmware/harbor/src/common"
+
 	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/dao/group"
 	"github.com/vmware/harbor/src/common/models"
 	ldapUtils "github.com/vmware/harbor/src/common/utils/ldap"
 	"github.com/vmware/harbor/src/common/utils/log"
@@ -130,6 +133,45 @@ func (l *Auth) SearchUser(username string) (*models.User, error) {
 	return &user, nil
 }
 
+//SearchGroup -- Search group in ldap authenticator, groupKey is LDAP group DN.
+func (l *Auth) SearchGroup(groupKey string) (*models.UserGroup, error) {
+	ldapSession, err := ldapUtils.LoadSystemLdapConfig()
+
+	if err != nil {
+		return nil, fmt.Errorf("can not load system ldap config: %v", err)
+	}
+
+	if err = ldapSession.Open(); err != nil {
+		log.Warningf("ldap connection fail: %v", err)
+		return nil, err
+	}
+	defer ldapSession.Close()
+	userGroupList, err := ldapSession.SearchGroupByDN(groupKey)
+
+	if err != nil {
+		log.Warningf("ldap search group fail: %v", err)
+		return nil, err
+	}
+
+	if len(userGroupList) == 0 {
+		return nil, fmt.Errorf("Failed to searh ldap group with groupDN:%v", groupKey)
+	}
+	userGroup := models.UserGroup{
+		GroupName:   userGroupList[0].GroupName,
+		LdapGroupDN: userGroupList[0].GroupDN,
+	}
+	return &userGroup, nil
+}
+
+// OnBoardGroup -- Create Group in harbor DB, if altGroupName is not empty, take the altGroupName as groupName in harbor DB.
+func (l *Auth) OnBoardGroup(u *models.UserGroup, altGroupName string) error {
+	if len(altGroupName) > 0 {
+		u.GroupName = altGroupName
+	}
+	u.GroupType = common.LdapGroupType
+	return group.OnBoardUserGroup(u, "LdapGroupDN", "GroupType")
+}
+
 //PostAuthenticate -- If user exist in harbor DB, sync email address, if not exist, call OnBoardUser
 func (l *Auth) PostAuthenticate(u *models.User) error {
 
diff --git a/src/ui/auth/ldap/ldap_test.go b/src/ui/auth/ldap/ldap_test.go
index 3f9c2bce59..ae6dc45e08 100644
--- a/src/ui/auth/ldap/ldap_test.go
+++ b/src/ui/auth/ldap/ldap_test.go
@@ -22,9 +22,11 @@ import (
 
 	"github.com/vmware/harbor/src/common"
 	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/dao/project"
 	"github.com/vmware/harbor/src/common/models"
 	"github.com/vmware/harbor/src/common/utils/log"
 	"github.com/vmware/harbor/src/common/utils/test"
+	"github.com/vmware/harbor/src/ui/api"
 	"github.com/vmware/harbor/src/ui/auth"
 	uiConfig "github.com/vmware/harbor/src/ui/config"
 )
@@ -46,7 +48,7 @@ var adminServerLdapTestConfig = map[string]interface{}{
 	common.LDAPBaseDN:    "dc=example,dc=com",
 	common.LDAPUID:       "uid",
 	common.LDAPFilter:    "",
-	common.LDAPScope:     3,
+	common.LDAPScope:     2,
 	common.LDAPTimeout:   30,
 	//	config.TokenServiceURL:            "",
 	//	config.RegistryURL:                "",
@@ -63,7 +65,11 @@ var adminServerLdapTestConfig = map[string]interface{}{
 	//	config.TokenExpiration:            30,
 	common.CfgExpiration: 5,
 	//	config.JobLogDir:                  "/var/log/jobs",
-	common.AdminInitialPassword: "password",
+	common.AdminInitialPassword:   "password",
+	common.LDAPGroupSearchFilter:  "objectclass=groupOfNames",
+	common.LDAPGroupBaseDN:        "dc=example,dc=com",
+	common.LDAPGroupAttributeName: "cn",
+	common.LDAPGroupSearchScope:   2,
 }
 
 func TestMain(m *testing.M) {
@@ -102,6 +108,24 @@ func TestMain(m *testing.M) {
 		log.Fatalf("failed to initialize database: %v", err)
 	}
 
+	//Extract to test utils
+	initSqls := []string{
+		"insert into user (username, email, password, realname)  values ('member_test_01', 'member_test_01@example.com', '123456', 'member_test_01')",
+		"insert into project (name, owner_id) values ('member_test_01', 1)",
+		"insert into user_group (group_name, group_type, group_property) values ('test_group_01', 1, 'CN=harbor_users,OU=sample,OU=vmware,DC=harbor,DC=com')",
+		"update project set owner_id = (select user_id from user where username = 'member_test_01') where name = 'member_test_01'",
+		"insert into project_member (project_id, entity_id, entity_type, role) values ( (select project_id from project where name = 'member_test_01') , (select user_id from user where username = 'member_test_01'), 'u', 1)",
+		"insert into project_member (project_id, entity_id, entity_type, role) values ( (select project_id from project where name = 'member_test_01') , (select id from user_group where group_name = 'test_group_01'), 'g', 1)",
+	}
+
+	clearSqls := []string{
+		"delete from project where name='member_test_01'",
+		"delete from user where username='member_test_01' or username='pm_sample'",
+		"delete from user_group",
+		"delete from project_member",
+	}
+	dao.PrepareTestData(clearSqls, initSqls)
+
 	retCode := m.Run()
 	os.Exit(retCode)
 }
@@ -168,7 +192,7 @@ func TestSearchUser_02(t *testing.T) {
 
 }
 
-func TestOnboardUser(t *testing.T) {
+func TestOnBoardUser(t *testing.T) {
 	user := &models.User{
 		Username: "sample",
 		Email:    "sample@example.com",
@@ -186,7 +210,7 @@ func TestOnboardUser(t *testing.T) {
 	assert.Equal(t, "sample@example.com", user.Email)
 }
 
-func TestOnboardUser_02(t *testing.T) {
+func TestOnBoardUser_02(t *testing.T) {
 	user := &models.User{
 		Username: "sample02",
 		Realname: "Sample02",
@@ -204,7 +228,7 @@ func TestOnboardUser_02(t *testing.T) {
 	dao.CleanUser(int64(user.UserID))
 }
 
-func TestOnboardUser_03(t *testing.T) {
+func TestOnBoardUser_03(t *testing.T) {
 	user := &models.User{
 		Username: "sample03@example.com",
 		Realname: "Sample03",
@@ -222,7 +246,7 @@ func TestOnboardUser_03(t *testing.T) {
 	dao.CleanUser(int64(user.UserID))
 }
 
-func TestAuthenticateHelperOnboardUser(t *testing.T) {
+func TestAuthenticateHelperOnBoardUser(t *testing.T) {
 	user := models.User{
 		Username: "test01",
 		Realname: "test01",
@@ -240,6 +264,21 @@ func TestAuthenticateHelperOnboardUser(t *testing.T) {
 
 }
 
+func TestOnBoardGroup(t *testing.T) {
+	group := models.UserGroup{
+		GroupName:   "harbor_group2",
+		LdapGroupDN: "cn=harbor_group2,ou=groups,dc=example,dc=com",
+	}
+	newGroupName := "group_name123"
+	err := auth.OnBoardGroup(&group, newGroupName)
+	if err != nil {
+		t.Errorf("Failed to OnBoardGroup, %+v", group)
+	}
+	if group.GroupName != "group_name123" {
+		t.Errorf("The OnBoardGroup should have name %v", newGroupName)
+	}
+}
+
 func TestAuthenticateHelperSearchUser(t *testing.T) {
 
 	user, err := auth.SearchUser("test")
@@ -307,3 +346,70 @@ func TestPostAuthentication(t *testing.T) {
 	assert.EqualValues("test003@example.com", dbUser.Email)
 	dao.CleanUser(int64(dbUser.UserID))
 }
+
+func TestSearchAndOnBoardUser(t *testing.T) {
+	userID, err := auth.SearchAndOnBoardUser("mike02")
+	defer dao.CleanUser(int64(userID))
+	if err != nil {
+		t.Errorf("Error occurred when SearchAndOnBoardUser: %v", err)
+	}
+	if userID == 0 {
+		t.Errorf("Can not search and onboard user %v", "mike")
+	}
+}
+func TestAddOrUpdateProjectMemberWithLdapUser(t *testing.T) {
+
+	currentProject, err := dao.GetProjectByName("member_test_01")
+	if err != nil {
+		t.Errorf("Error occurred when GetProjectByName: %v", err)
+	}
+	member := models.MemberReq{
+		ProjectID: currentProject.ProjectID,
+		MemberUser: models.User{
+			Username: "mike",
+		},
+		Role: models.PROJECTADMIN,
+	}
+
+	pmid, err := api.AddOrUpdateProjectMember(currentProject.ProjectID, member)
+	if err != nil {
+		t.Errorf("Error occurred in AddOrUpdateProjectMember: %v", err)
+	}
+	if pmid == 0 {
+		t.Errorf("Error occurred in AddOrUpdateProjectMember: pmid:%v", pmid)
+	}
+
+}
+func TestAddProjectMemberWithLdapGroup(t *testing.T) {
+
+	currentProject, err := dao.GetProjectByName("member_test_01")
+	if err != nil {
+		t.Errorf("Error occurred when GetProjectByName: %v", err)
+	}
+	member := models.MemberReq{
+		ProjectID: currentProject.ProjectID,
+		MemberGroup: models.UserGroup{
+			LdapGroupDN: "cn=harbor_users,ou=groups,dc=example,dc=com",
+		},
+		Role: models.PROJECTADMIN,
+	}
+
+	pmid, err := api.AddOrUpdateProjectMember(currentProject.ProjectID, member)
+	if err != nil {
+		t.Errorf("Error occurred in AddOrUpdateProjectMember: %v", err)
+	}
+	if pmid == 0 {
+		t.Errorf("Error occurred in AddOrUpdateProjectMember: pmid: %v", pmid)
+	}
+	queryMember := models.Member{
+		ProjectID: currentProject.ProjectID,
+	}
+	memberList, err := project.GetProjectMember(queryMember)
+	if err != nil {
+		t.Errorf("Failed to query project member, %v, error: %v", queryMember, err)
+	}
+
+	if len(memberList) == 0 {
+		t.Errorf("Failed to query project member, %v", queryMember)
+	}
+}
diff --git a/src/ui/router.go b/src/ui/router.go
index 59a0b62881..121f8cb2e8 100644
--- a/src/ui/router.go
+++ b/src/ui/router.go
@@ -46,6 +46,7 @@ func initRouters() {
 
 		//API:
 		beego.Router("/api/projects/:pid([0-9]+)/members/?:mid", &api.ProjectUserMemberAPI{})
+		beego.Router("/api/projects/:pid([0-9]+)/projectmembers/?:pmid([0-9]+)", &api.ProjectMemberAPI{})
 		beego.Router("/api/projects/", &api.ProjectAPI{}, "head:Head")
 		beego.Router("/api/projects/:id([0-9]+)", &api.ProjectAPI{})
 
@@ -53,8 +54,10 @@ func initRouters() {
 		beego.Router("/api/users", &api.UserAPI{}, "get:List;post:Post")
 		beego.Router("/api/users/:id([0-9]+)/password", &api.UserAPI{}, "put:ChangePassword")
 		beego.Router("/api/users/:id/sysadmin", &api.UserAPI{}, "put:ToggleUserAdminRole")
+		beego.Router("/api/usergroups/?:ugid([0-9]+)", &api.UserGroupAPI{})
 		beego.Router("/api/ldap/ping", &api.LdapAPI{}, "post:Ping")
-		beego.Router("/api/ldap/users/search", &api.LdapAPI{}, "post:Search")
+		beego.Router("/api/ldap/users/search", &api.LdapAPI{}, "get:Search")
+		beego.Router("/api/ldap/groups/search", &api.LdapAPI{}, "get:SearchGroup")
 		beego.Router("/api/ldap/users/import", &api.LdapAPI{}, "post:ImportUser")
 		beego.Router("/api/email/ping", &api.EmailAPI{}, "post:Ping")
 	}
@@ -115,7 +118,7 @@ func initRouters() {
 	beego.Router("/service/token", &token.Handler{})
 
 	beego.Router("/registryproxy/*", &controllers.RegistryProxy{}, "*:Handle")
-	
+
 	//Error pages
 	beego.ErrorController(&controllers.ErrorController{})
 
diff --git a/tests/ldap_test.ldif b/tests/ldap_test.ldif
index bc8ddde56e..7053102b69 100644
--- a/tests/ldap_test.ldif
+++ b/tests/ldap_test.ldif
@@ -33,6 +33,24 @@ member: cn=mike02,ou=people,dc=example,dc=com
 objectclass: groupOfNames
 objectclass: top
 
+# Group Entry harbor_group
+dn: cn=harbor_group,ou=groups,dc=example,dc=com
+cn: harbor_group
+description: harbor group
+member: cn=mike,ou=people,dc=example,dc=com
+member: cn=mike02,ou=people,dc=example,dc=com
+objectclass: groupOfNames
+objectclass: top
+
+# Group Entry harbor_group2
+dn: cn=harbor_group2,ou=groups,dc=example,dc=com
+cn: harbor_group2
+description: harbor group2
+member: cn=mike,ou=people,dc=example,dc=com
+member: cn=mike02,ou=people,dc=example,dc=com
+objectclass: groupOfNames
+objectclass: top
+
 # User belongs to harbor_user
 dn: cn=mike,ou=people,dc=example,dc=com
 cn: mike