diff --git a/make/migrations/postgresql/0004_1.8.0_schema.up.sql b/make/migrations/postgresql/0004_1.8.0_schema.up.sql
index d2cb540a0..846068dc9 100644
--- a/make/migrations/postgresql/0004_1.8.0_schema.up.sql
+++ b/make/migrations/postgresql/0004_1.8.0_schema.up.sql
@@ -155,3 +155,18 @@ DROP INDEX poid_uptime;
 DROP INDEX poid_status;
 DROP TRIGGER replication_job_update_time_at_modtime ON replication_job;
 ALTER TABLE replication_job RENAME TO replication_schedule_job;
+
+/*
+migrate scan all schedule
+
+If user set the scan all schedule, move it into table admin_job, and let the api the parse the json data.
+*/
+DO $$
+BEGIN
+    IF exists(select * FROM properties WHERE k = 'scan_all_policy') then
+        INSERT INTO admin_job (job_name, job_kind, cron_str, status) VALUES ('IMAGE_SCAN_ALL', 'Periodic', (select v FROM properties WHERE k = 'scan_all_policy'), 'pending');
+        DELETE FROM properties WHERE k='scan_all_policy';
+    END IF;
+END $$;
+
+
diff --git a/src/common/models/adminjob.go b/src/common/models/adminjob.go
index 37aedfef3..ca31a9c18 100644
--- a/src/common/models/adminjob.go
+++ b/src/common/models/adminjob.go
@@ -15,6 +15,7 @@
 package models
 
 import (
+	"fmt"
 	"time"
 )
 
@@ -51,3 +52,27 @@ type AdminJobQuery struct {
 	Deleted bool
 	Pagination
 }
+
+// ScheduleParam ...
+type ScheduleParam struct {
+	Type    string `json:"type"`
+	Weekday int8   `json:"weekday"`
+	Offtime int64  `json:"offtime"`
+}
+
+// ParseScheduleParamToCron ...
+func ParseScheduleParamToCron(param *ScheduleParam) string {
+	if param == nil {
+		return ""
+	}
+	offtime := param.Offtime
+	offtime = offtime % (3600 * 24)
+	hour := int(offtime / 3600)
+	offtime = offtime % 3600
+	minute := int(offtime / 60)
+	second := int(offtime % 60)
+	if param.Type == "Weekly" {
+		return fmt.Sprintf("%d %d %d * * %d", second, minute, hour, param.Weekday%7)
+	}
+	return fmt.Sprintf("%d %d %d * * *", second, minute, hour)
+}
diff --git a/src/core/api/admin_job.go b/src/core/api/admin_job.go
index 1fbb1be32..112b3b3c6 100644
--- a/src/core/api/admin_job.go
+++ b/src/core/api/admin_job.go
@@ -19,7 +19,6 @@ import (
 	"net/http"
 	"strconv"
 
-	"encoding/json"
 	"github.com/goharbor/harbor/src/common/dao"
 	common_http "github.com/goharbor/harbor/src/common/http"
 	common_job "github.com/goharbor/harbor/src/common/job"
@@ -283,11 +282,11 @@ func convertToAdminJobRep(job *common_models.AdminJob) (models.AdminJobRep, erro
 	}
 
 	if len(job.Cron) > 0 {
-		schedule := &models.ScheduleParam{}
-		if err := json.Unmarshal([]byte(job.Cron), &schedule); err != nil {
+		schedule, err := models.ConvertSchedule(job.Cron)
+		if err != nil {
 			return models.AdminJobRep{}, err
 		}
-		AdminJobRep.Schedule = schedule
+		AdminJobRep.Schedule = &schedule
 	}
 	return AdminJobRep, nil
 }
diff --git a/src/core/api/models/admin_job.go b/src/core/api/models/admin_job.go
index 1dd3465d2..dfd3da3b8 100644
--- a/src/core/api/models/admin_job.go
+++ b/src/core/api/models/admin_job.go
@@ -17,11 +17,14 @@ package models
 import (
 	"encoding/json"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/astaxie/beego/validation"
 	"github.com/goharbor/harbor/src/common/job"
 	"github.com/goharbor/harbor/src/common/job/models"
+	common_models "github.com/goharbor/harbor/src/common/models"
+	common_utils "github.com/goharbor/harbor/src/common/utils"
 	"github.com/goharbor/harbor/src/common/utils/log"
 	"github.com/goharbor/harbor/src/core/config"
 	"github.com/robfig/cron"
@@ -139,3 +142,42 @@ func (ar *AdminJobReq) CronString() string {
 	}
 	return string(str)
 }
+
+// ConvertSchedule converts different kinds of cron string into one standard for UI to show.
+// in the latest design, it uses {"type":"Daily","cron":"0 0 0 * * *"} as the cron item.
+// As for supporting migration from older version, it needs to convert {"parameter":{"daily_time":0},"type":"daily"}
+// and {"type":"Daily","weekday":0,"offtime":57600} into one standard.
+func ConvertSchedule(cronStr string) (ScheduleParam, error) {
+	if cronStr == "" {
+		return ScheduleParam{}, nil
+	}
+
+	convertedSchedule := ScheduleParam{}
+	convertedSchedule.Type = "custom"
+
+	if strings.Contains(cronStr, "parameter") {
+		scheduleModel := common_models.ScanAllPolicy{}
+		if err := json.Unmarshal([]byte(cronStr), &scheduleModel); err != nil {
+			return ScheduleParam{}, err
+		}
+		h, m, s := common_utils.ParseOfftime(int64(scheduleModel.Parm["daily_time"].(float64)))
+		cron := fmt.Sprintf("%d %d %d * * *", s, m, h)
+		convertedSchedule.Cron = cron
+		return convertedSchedule, nil
+	} else if strings.Contains(cronStr, "offtime") {
+		scheduleModel := common_models.ScheduleParam{}
+		if err := json.Unmarshal([]byte(cronStr), &scheduleModel); err != nil {
+			return ScheduleParam{}, err
+		}
+		convertedSchedule.Cron = common_models.ParseScheduleParamToCron(&scheduleModel)
+		return convertedSchedule, nil
+	} else if strings.Contains(cronStr, "cron") {
+		scheduleModel := ScheduleParam{}
+		if err := json.Unmarshal([]byte(cronStr), &scheduleModel); err != nil {
+			return ScheduleParam{}, err
+		}
+		return scheduleModel, nil
+	}
+
+	return ScheduleParam{}, fmt.Errorf("unsupported cron format, %s", cronStr)
+}
diff --git a/src/core/api/models/admin_job_test.go b/src/core/api/models/admin_job_test.go
index 51e5394a3..3a149fe12 100644
--- a/src/core/api/models/admin_job_test.go
+++ b/src/core/api/models/admin_job_test.go
@@ -137,3 +137,20 @@ func TestCronString(t *testing.T) {
 	cronStr := adminjob.CronString()
 	assert.True(t, strings.EqualFold(cronStr, "{\"type\":\"Daily\",\"Cron\":\"20 3 0 * * *\"}"))
 }
+
+func TestConvertSchedule(t *testing.T) {
+	schedule1 := "{\"type\":\"Daily\",\"cron\":\"20 3 0 * * *\"}"
+	converted1, err1 := ConvertSchedule(schedule1)
+	assert.Nil(t, err1)
+	assert.Equal(t, converted1.Cron, "20 3 0 * * *")
+
+	schedule2 := "{\"type\":\"Daily\",\"weekday\":0,\"offtime\":57720}"
+	converted2, err2 := ConvertSchedule(schedule2)
+	assert.Nil(t, err2)
+	assert.Equal(t, converted2.Cron, "0 2 16 * * *")
+
+	schedule3 := "{\"parameter\":{\"daily_time\":57720},\"type\":\"daily\"}"
+	converted3, err3 := ConvertSchedule(schedule3)
+	assert.Nil(t, err3)
+	assert.Equal(t, converted3.Cron, "0 2 16 * * *")
+}