diff --git a/cmd/answer/wire_gen.go b/cmd/answer/wire_gen.go
index 515efa46..807fd0ef 100644
--- a/cmd/answer/wire_gen.go
+++ b/cmd/answer/wire_gen.go
@@ -166,7 +166,7 @@ func initApplication(debug bool, serverConf *conf.Server, dbConf *data.Database,
 	answerActivityService := activity2.NewAnswerActivityService(answerActivityRepo, questionActivityRepo)
 	questionService := service.NewQuestionService(questionRepo, tagCommonService, questionCommon, userCommon, revisionService, metaService, collectionCommon, answerActivityService, dataData)
 	questionController := controller.NewQuestionController(questionService, rankService)
-	answerService := service.NewAnswerService(answerRepo, questionRepo, questionCommon, userCommon, collectionCommon, userRepo, revisionService, answerActivityService, answerCommon, voteRepo, emailService)
+	answerService := service.NewAnswerService(answerRepo, questionRepo, questionCommon, userCommon, collectionCommon, userRepo, revisionService, answerActivityService, answerCommon, voteRepo, emailService, userRoleRelService)
 	dashboardService := dashboard.NewDashboardService(questionRepo, answerRepo, commentCommonRepo, voteRepo, userRepo, reportRepo, configRepo, siteInfoCommonService, serviceConf, dataData)
 	answerController := controller.NewAnswerController(answerService, rankService, dashboardService)
 	searchParser := search_parser.NewSearchParser(tagCommonService, userCommon)
diff --git a/docs/docs.go b/docs/docs.go
index 9f73acfa..b9186b54 100644
--- a/docs/docs.go
+++ b/docs/docs.go
@@ -5592,7 +5592,8 @@ const docTemplate = `{
                 },
                 "original_text": {
                     "description": "original text",
-                    "type": "string"
+                    "type": "string",
+                    "maxLength": 65536
                 },
                 "slug_name": {
                     "description": "slug_name",
@@ -5993,14 +5994,6 @@ const docTemplate = `{
                     "description": "user id",
                     "type": "string"
                 },
-                "ip_info": {
-                    "description": "ip info",
-                    "type": "string"
-                },
-                "is_admin": {
-                    "description": "is admin",
-                    "type": "boolean"
-                },
                 "last_login_date": {
                     "description": "last login date",
                     "type": "integer"
@@ -6484,10 +6477,6 @@ const docTemplate = `{
                     "description": "ip info",
                     "type": "string"
                 },
-                "is_admin": {
-                    "description": "is admin",
-                    "type": "boolean"
-                },
                 "language": {
                     "description": "language",
                     "type": "string"
@@ -6520,6 +6509,10 @@ const docTemplate = `{
                     "description": "rank",
                     "type": "integer"
                 },
+                "role_id": {
+                    "description": "role id",
+                    "type": "integer"
+                },
                 "status": {
                     "description": "user status",
                     "type": "string"
@@ -6584,10 +6577,6 @@ const docTemplate = `{
                     "description": "ip info",
                     "type": "string"
                 },
-                "is_admin": {
-                    "description": "is admin",
-                    "type": "boolean"
-                },
                 "language": {
                     "description": "language",
                     "type": "string"
@@ -6620,6 +6609,10 @@ const docTemplate = `{
                     "description": "rank",
                     "type": "integer"
                 },
+                "role_id": {
+                    "description": "role id",
+                    "type": "integer"
+                },
                 "status": {
                     "description": "user status",
                     "type": "string"
diff --git a/docs/swagger.json b/docs/swagger.json
index 3ebb716e..00170a0a 100644
--- a/docs/swagger.json
+++ b/docs/swagger.json
@@ -5580,7 +5580,8 @@
                 },
                 "original_text": {
                     "description": "original text",
-                    "type": "string"
+                    "type": "string",
+                    "maxLength": 65536
                 },
                 "slug_name": {
                     "description": "slug_name",
@@ -5981,14 +5982,6 @@
                     "description": "user id",
                     "type": "string"
                 },
-                "ip_info": {
-                    "description": "ip info",
-                    "type": "string"
-                },
-                "is_admin": {
-                    "description": "is admin",
-                    "type": "boolean"
-                },
                 "last_login_date": {
                     "description": "last login date",
                     "type": "integer"
@@ -6472,10 +6465,6 @@
                     "description": "ip info",
                     "type": "string"
                 },
-                "is_admin": {
-                    "description": "is admin",
-                    "type": "boolean"
-                },
                 "language": {
                     "description": "language",
                     "type": "string"
@@ -6508,6 +6497,10 @@
                     "description": "rank",
                     "type": "integer"
                 },
+                "role_id": {
+                    "description": "role id",
+                    "type": "integer"
+                },
                 "status": {
                     "description": "user status",
                     "type": "string"
@@ -6572,10 +6565,6 @@
                     "description": "ip info",
                     "type": "string"
                 },
-                "is_admin": {
-                    "description": "is admin",
-                    "type": "boolean"
-                },
                 "language": {
                     "description": "language",
                     "type": "string"
@@ -6608,6 +6597,10 @@
                     "description": "rank",
                     "type": "integer"
                 },
+                "role_id": {
+                    "description": "role id",
+                    "type": "integer"
+                },
                 "status": {
                     "description": "user status",
                     "type": "string"
diff --git a/docs/swagger.yaml b/docs/swagger.yaml
index e0561059..b64361ca 100644
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@@ -182,6 +182,7 @@ definitions:
         type: string
       original_text:
         description: original text
+        maxLength: 65536
         type: string
       slug_name:
         description: slug_name
@@ -472,12 +473,6 @@ definitions:
       id:
         description: user id
         type: string
-      ip_info:
-        description: ip info
-        type: string
-      is_admin:
-        description: is admin
-        type: boolean
       last_login_date:
         description: last login date
         type: integer
@@ -824,9 +819,6 @@ definitions:
       ip_info:
         description: ip info
         type: string
-      is_admin:
-        description: is admin
-        type: boolean
       language:
         description: language
         type: string
@@ -851,6 +843,9 @@ definitions:
       rank:
         description: rank
         type: integer
+      role_id:
+        description: role id
+        type: integer
       status:
         description: user status
         type: string
@@ -898,9 +893,6 @@ definitions:
       ip_info:
         description: ip info
         type: string
-      is_admin:
-        description: is admin
-        type: boolean
       language:
         description: language
         type: string
@@ -925,6 +917,9 @@ definitions:
       rank:
         description: rank
         type: integer
+      role_id:
+        description: role id
+        type: integer
       status:
         description: user status
         type: string
diff --git a/internal/base/middleware/auth.go b/internal/base/middleware/auth.go
index a7796c87..b2150e38 100644
--- a/internal/base/middleware/auth.go
+++ b/internal/base/middleware/auth.go
@@ -4,6 +4,7 @@ import (
 	"strings"
 
 	"github.com/answerdev/answer/internal/schema"
+	"github.com/answerdev/answer/internal/service/role"
 	"github.com/answerdev/answer/internal/service/siteinfo_common"
 
 	"github.com/answerdev/answer/internal/base/handler"
@@ -154,7 +155,7 @@ func GetIsAdminFromContext(ctx *gin.Context) (isAdmin bool) {
 	if userInfo == nil {
 		return false
 	}
-	return userInfo.IsAdmin
+	return userInfo.RoleID == role.RoleAdminID
 }
 
 // GetUserInfoFromContext get user info from context
diff --git a/internal/controller/activity_controller.go b/internal/controller/activity_controller.go
index 917e1634..78140b67 100644
--- a/internal/controller/activity_controller.go
+++ b/internal/controller/activity_controller.go
@@ -6,6 +6,7 @@ import (
 	"github.com/answerdev/answer/internal/schema"
 	"github.com/answerdev/answer/internal/service/activity"
 	"github.com/answerdev/answer/internal/service/activity_common"
+	"github.com/answerdev/answer/internal/service/role"
 	"github.com/gin-gonic/gin"
 )
 
@@ -40,7 +41,7 @@ func (ac *ActivityController) GetObjectTimeline(ctx *gin.Context) {
 
 	req.UserID = middleware.GetLoginUserIDFromContext(ctx)
 	if userInfo := middleware.GetUserInfoFromContext(ctx); userInfo != nil {
-		req.IsAdmin = userInfo.IsAdmin
+		req.IsAdmin = userInfo.RoleID == role.RoleAdminID
 	}
 
 	resp, err := ac.activityService.GetObjectTimeline(ctx, req)
diff --git a/internal/controller/answer_controller.go b/internal/controller/answer_controller.go
index 684988ef..28b61141 100644
--- a/internal/controller/answer_controller.go
+++ b/internal/controller/answer_controller.go
@@ -51,13 +51,16 @@ func (ac *AnswerController) RemoveAnswer(ctx *gin.Context) {
 	}
 
 	req.UserID = middleware.GetLoginUserIDFromContext(ctx)
-	req.IsAdmin = middleware.GetIsAdminFromContext(ctx)
-	can, err := ac.rankService.CheckOperationPermission(ctx, req.UserID, permission.AnswerDelete, req.ID)
+	objectOwner := ac.rankService.CheckOperationObjectOwner(ctx, req.UserID, req.ID)
+	canList, err := ac.rankService.CheckOperationPermissions(ctx, req.UserID, []string{
+		permission.AnswerDelete,
+	})
 	if err != nil {
 		handler.HandleResponse(ctx, err, nil)
 		return
 	}
-	if !can {
+	req.CanDelete = canList[0] || objectOwner
+	if !req.CanDelete {
 		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
 		return
 	}
diff --git a/internal/entity/auth_user_entity.go b/internal/entity/auth_user_entity.go
index f71d79df..a417cd2a 100644
--- a/internal/entity/auth_user_entity.go
+++ b/internal/entity/auth_user_entity.go
@@ -5,5 +5,5 @@ type UserCacheInfo struct {
 	UserID      string `json:"user_id"`
 	UserStatus  int    `json:"user_status"`
 	EmailStatus int    `json:"email_status"`
-	IsAdmin     bool   `json:"is_admin"`
+	RoleID      int    `json:"role_id"`
 }
diff --git a/internal/schema/answer_schema.go b/internal/schema/answer_schema.go
index 7fc6a12d..7efd6e67 100644
--- a/internal/schema/answer_schema.go
+++ b/internal/schema/answer_schema.go
@@ -10,8 +10,9 @@ type RemoveAnswerReq struct {
 	// answer id
 	ID string `validate:"required" json:"id"`
 	// user id
-	UserID  string `json:"-"`
-	IsAdmin bool   `json:"-"`
+	UserID string `json:"-"`
+	// whether user can delete it
+	CanDelete bool `json:"-"`
 }
 
 const (
diff --git a/internal/schema/user_schema.go b/internal/schema/user_schema.go
index 308568c8..cb356584 100644
--- a/internal/schema/user_schema.go
+++ b/internal/schema/user_schema.go
@@ -66,8 +66,8 @@ type GetUserResp struct {
 	Language string `json:"language"`
 	// access token
 	AccessToken string `json:"access_token"`
-	// is admin
-	IsAdmin bool `json:"is_admin"`
+	// role id
+	RoleID int `json:"role_id"`
 	// user status
 	Status string `json:"status"`
 }
@@ -159,11 +159,7 @@ type GetOtherUserInfoByUsernameResp struct {
 	// website
 	Website string `json:"website"`
 	// location
-	Location string `json:"location"`
-	// ip info
-	IPInfo string `json:"ip_info"`
-	// is admin
-	IsAdmin   bool   `json:"is_admin"`
+	Location  string `json:"location"`
 	Status    string `json:"status"`
 	StatusMsg string `json:"status_msg,omitempty"`
 }
diff --git a/internal/service/answer_service.go b/internal/service/answer_service.go
index 974482c9..738e4a55 100644
--- a/internal/service/answer_service.go
+++ b/internal/service/answer_service.go
@@ -20,6 +20,7 @@ import (
 	"github.com/answerdev/answer/internal/service/permission"
 	questioncommon "github.com/answerdev/answer/internal/service/question_common"
 	"github.com/answerdev/answer/internal/service/revision_common"
+	"github.com/answerdev/answer/internal/service/role"
 	usercommon "github.com/answerdev/answer/internal/service/user_common"
 	"github.com/answerdev/answer/pkg/encryption"
 	"github.com/segmentfault/pacman/errors"
@@ -39,6 +40,7 @@ type AnswerService struct {
 	AnswerCommon          *answercommon.AnswerCommon
 	voteRepo              activity_common.VoteRepo
 	emailService          *export.EmailService
+	roleService           *role.UserRoleRelService
 }
 
 func NewAnswerService(
@@ -53,6 +55,7 @@ func NewAnswerService(
 	answerCommon *answercommon.AnswerCommon,
 	voteRepo activity_common.VoteRepo,
 	emailService *export.EmailService,
+	roleService *role.UserRoleRelService,
 ) *AnswerService {
 	return &AnswerService{
 		answerRepo:            answerRepo,
@@ -66,6 +69,7 @@ func NewAnswerService(
 		AnswerCommon:          answerCommon,
 		voteRepo:              voteRepo,
 		emailService:          emailService,
+		roleService:           roleService,
 	}
 }
 
@@ -82,7 +86,11 @@ func (as *AnswerService) RemoveAnswer(ctx context.Context, req *schema.RemoveAns
 	if answerInfo.Status == entity.AnswerStatusDeleted {
 		return nil
 	}
-	if !req.IsAdmin {
+	roleID, err := as.roleService.GetUserRole(ctx, req.UserID)
+	if err != nil {
+		return err
+	}
+	if roleID != role.RoleAdminID && roleID != role.RoleModeratorID {
 		if answerInfo.UserID != req.UserID {
 			return errors.BadRequest(reason.AnswerCannotDeleted)
 		}
diff --git a/internal/service/auth/auth.go b/internal/service/auth/auth.go
index e500f0b9..75f67944 100644
--- a/internal/service/auth/auth.go
+++ b/internal/service/auth/auth.go
@@ -45,7 +45,7 @@ func (as *AuthService) GetUserCacheInfo(ctx context.Context, accessToken string)
 		log.Debugf("user status updated: %+v", cacheInfo)
 		userCacheInfo.UserStatus = cacheInfo.UserStatus
 		userCacheInfo.EmailStatus = cacheInfo.EmailStatus
-		userCacheInfo.IsAdmin = cacheInfo.IsAdmin
+		userCacheInfo.RoleID = cacheInfo.RoleID
 		// update current user cache info
 		err := as.authRepo.SetUserCacheInfo(ctx, accessToken, userCacheInfo)
 		if err != nil {
diff --git a/internal/service/tag_common/tag_common.go b/internal/service/tag_common/tag_common.go
index 094ce594..6a390a0f 100644
--- a/internal/service/tag_common/tag_common.go
+++ b/internal/service/tag_common/tag_common.go
@@ -244,6 +244,17 @@ func (ts *TagCommonService) AddTag(ctx context.Context, req *schema.AddTagReq) (
 	if err != nil {
 		return nil, err
 	}
+	revisionDTO := &schema.AddRevisionDTO{
+		UserID:   req.UserID,
+		ObjectID: tagInfo.ID,
+		Title:    tagInfo.SlugName,
+	}
+	tagInfoJson, _ := json.Marshal(tagInfo)
+	revisionDTO.Content = string(tagInfoJson)
+	_, err = ts.revisionService.AddRevision(ctx, revisionDTO, true)
+	if err != nil {
+		return nil, err
+	}
 	return &schema.AddTagResp{SlugName: tagInfo.SlugName}, nil
 }
 
diff --git a/internal/service/user_service.go b/internal/service/user_service.go
index e7bd4374..a578f456 100644
--- a/internal/service/user_service.go
+++ b/internal/service/user_service.go
@@ -81,7 +81,7 @@ func (us *UserService) GetUserInfoByUserID(ctx context.Context, token, userID st
 	resp = &schema.GetUserToSetShowResp{}
 	resp.GetFromUserEntity(userInfo)
 	resp.AccessToken = token
-	resp.IsAdmin = roleID == role.RoleAdminID
+	resp.RoleID = roleID
 	return resp, nil
 }
 
@@ -131,14 +131,14 @@ func (us *UserService) EmailLogin(ctx context.Context, req *schema.UserEmailLogi
 		UserID:      userInfo.ID,
 		EmailStatus: userInfo.MailStatus,
 		UserStatus:  userInfo.Status,
-		IsAdmin:     roleID == role.RoleAdminID,
+		RoleID:      roleID,
 	}
 	resp.AccessToken, err = us.authService.SetUserCacheInfo(ctx, userCacheInfo)
 	if err != nil {
 		return nil, err
 	}
-	resp.IsAdmin = userCacheInfo.IsAdmin
-	if resp.IsAdmin {
+	resp.RoleID = userCacheInfo.RoleID
+	if resp.RoleID == role.RoleAdminID {
 		err = us.authService.SetAdminUserCacheInfo(ctx, resp.AccessToken, userCacheInfo)
 		if err != nil {
 			return nil, err
@@ -365,14 +365,14 @@ func (us *UserService) UserRegisterByEmail(ctx context.Context, registerUserInfo
 		UserID:      userInfo.ID,
 		EmailStatus: userInfo.MailStatus,
 		UserStatus:  userInfo.Status,
-		IsAdmin:     roleID == role.RoleAdminID,
+		RoleID:      roleID,
 	}
 	resp.AccessToken, err = us.authService.SetUserCacheInfo(ctx, userCacheInfo)
 	if err != nil {
 		return nil, nil, err
 	}
-	resp.IsAdmin = userCacheInfo.IsAdmin
-	if resp.IsAdmin {
+	resp.RoleID = userCacheInfo.RoleID
+	if resp.RoleID == role.RoleAdminID {
 		err = us.authService.SetAdminUserCacheInfo(ctx, resp.AccessToken, &entity.UserCacheInfo{UserID: userInfo.ID})
 		if err != nil {
 			return nil, nil, err
@@ -457,7 +457,7 @@ func (us *UserService) UserVerifyEmail(ctx context.Context, req *schema.UserVeri
 		UserID:      userInfo.ID,
 		EmailStatus: userInfo.MailStatus,
 		UserStatus:  userInfo.Status,
-		IsAdmin:     roleID == role.RoleAdminID,
+		RoleID:      roleID,
 	}
 	resp.AccessToken, err = us.authService.SetUserCacheInfo(ctx, userCacheInfo)
 	if err != nil {
@@ -467,8 +467,8 @@ func (us *UserService) UserVerifyEmail(ctx context.Context, req *schema.UserVeri
 	if err = us.authService.SetUserStatus(ctx, userCacheInfo); err != nil {
 		return nil, err
 	}
-	resp.IsAdmin = userCacheInfo.IsAdmin
-	if resp.IsAdmin {
+	resp.RoleID = userCacheInfo.RoleID
+	if resp.RoleID == role.RoleAdminID {
 		err = us.authService.SetAdminUserCacheInfo(ctx, resp.AccessToken, &entity.UserCacheInfo{UserID: userInfo.ID})
 		if err != nil {
 			return nil, err