diff --git a/api/core/config.go b/api/core/config.go
index 00c2f7a2..bf387d30 100644
--- a/api/core/config.go
+++ b/api/core/config.go
@@ -35,6 +35,13 @@ func NewDefaultConfig() *types.AppConfig {
 		},
 		ApiConfig: types.ChatPlusApiConfig{},
 		ExtConfig: types.ChatPlusExtConfig{Token: utils.RandString(32)},
+		OSS: types.OSSConfig{
+			Active: "local",
+			Local: types.LocalStorageConfig{
+				BaseURL:  "http://localhost/5678/static/upload",
+				BasePath: "./static/upload",
+			},
+		},
 	}
 }
 
diff --git a/api/handler/upload_handler.go b/api/handler/upload_handler.go
index 08baedf8..2a0e1cbb 100644
--- a/api/handler/upload_handler.go
+++ b/api/handler/upload_handler.go
@@ -22,7 +22,7 @@ func NewUploadHandler(app *core.AppServer, db *gorm.DB, manager *oss.UploaderMan
 }
 
 func (h *UploadHandler) Upload(c *gin.Context) {
-	fileURL, err := h.uploaderManager.GetActiveService().PutFile(c)
+	fileURL, err := h.uploaderManager.GetActiveService().PutFile(c, "file")
 	if err != nil {
 		resp.ERROR(c, fmt.Sprintf("文件上传失败: %s", err.Error()))
 		return
diff --git a/api/handler/user_handler.go b/api/handler/user_handler.go
index 772c5edc..7e21dd44 100644
--- a/api/handler/user_handler.go
+++ b/api/handler/user_handler.go
@@ -3,6 +3,7 @@ package handler
 import (
 	"chatplus/core"
 	"chatplus/core/types"
+	"chatplus/service/oss"
 	"chatplus/store"
 	"chatplus/store/model"
 	"chatplus/store/vo"
@@ -20,13 +21,19 @@ import (
 
 type UserHandler struct {
 	BaseHandler
-	db       *gorm.DB
-	searcher *xdb.Searcher
-	leveldb  *store.LevelDB
+	db            *gorm.DB
+	searcher      *xdb.Searcher
+	leveldb       *store.LevelDB
+	uploadManager *oss.UploaderManager
 }
 
-func NewUserHandler(app *core.AppServer, db *gorm.DB, searcher *xdb.Searcher, levelDB *store.LevelDB) *UserHandler {
-	handler := &UserHandler{db: db, searcher: searcher, leveldb: levelDB}
+func NewUserHandler(
+	app *core.AppServer,
+	db *gorm.DB,
+	searcher *xdb.Searcher,
+	levelDB *store.LevelDB,
+	manager *oss.UploaderManager) *UserHandler {
+	handler := &UserHandler{db: db, searcher: searcher, leveldb: levelDB, uploadManager: manager}
 	handler.App = app
 	return handler
 }
@@ -256,6 +263,7 @@ func (h *UserHandler) ProfileUpdate(c *gin.Context) {
 	}
 	h.db.First(&user, user.Id)
 	user.Nickname = data.Nickname
+	oldAvatar := user.Avatar
 	user.Avatar = data.Avatar
 
 	var chatConfig types.ChatConfig
@@ -278,6 +286,14 @@ func (h *UserHandler) ProfileUpdate(c *gin.Context) {
 		resp.ERROR(c, "更新用户信息失败")
 		return
 	}
+
+	// remove the old avatar image file
+	if oldAvatar != data.Avatar {
+		err = h.uploadManager.GetActiveService().Delete(oldAvatar)
+		if err != nil {
+			logger.Error("error with delete image: ", err)
+		}
+	}
 	resp.SUCCESS(c)
 }
 
diff --git a/api/service/oss/localstorage_service.go b/api/service/oss/localstorage_service.go
index 853a2686..f51a2664 100644
--- a/api/service/oss/localstorage_service.go
+++ b/api/service/oss/localstorage_service.go
@@ -5,7 +5,9 @@ import (
 	"chatplus/utils"
 	"fmt"
 	"github.com/gin-gonic/gin"
+	"os"
 	"path/filepath"
+	"strings"
 )
 
 type LocalStorageService struct {
@@ -20,8 +22,8 @@ func NewLocalStorageService(config *types.AppConfig) LocalStorageService {
 	}
 }
 
-func (s LocalStorageService) PutFile(ctx *gin.Context) (string, error) {
-	file, err := ctx.FormFile("file")
+func (s LocalStorageService) PutFile(ctx *gin.Context, name string) (string, error) {
+	file, err := ctx.FormFile(name)
 	if err != nil {
 		return "", fmt.Errorf("error with get form: %v", err)
 	}
@@ -54,4 +56,9 @@ func (s LocalStorageService) PutImg(imageURL string) (string, error) {
 	return utils.GenUploadUrl(s.config.BasePath, s.config.BaseURL, filePath), nil
 }
 
+func (s LocalStorageService) Delete(fileURL string) error {
+	filePath := strings.Replace(fileURL, s.config.BaseURL, s.config.BasePath, 1)
+	return os.Remove(filePath)
+}
+
 var _ Uploader = LocalStorageService{}
diff --git a/api/service/oss/minio_service.go b/api/service/oss/minio_service.go
index b431a238..c898189f 100644
--- a/api/service/oss/minio_service.go
+++ b/api/service/oss/minio_service.go
@@ -37,7 +37,7 @@ func (s MinioService) PutImg(imageURL string) (string, error) {
 		return "", fmt.Errorf("error with download image: %v", err)
 	}
 	fileExt := filepath.Ext(filepath.Base(imageURL))
-	filename := fmt.Sprintf("%d%s", time.Now().UnixNano(), fileExt)
+	filename := fmt.Sprintf("%d%s", time.Now().UnixMicro(), fileExt)
 	info, err := s.client.PutObject(
 		context.Background(),
 		s.config.Bucket,
@@ -51,8 +51,8 @@ func (s MinioService) PutImg(imageURL string) (string, error) {
 	return fmt.Sprintf("%s/%s/%s", s.config.Domain, s.config.Bucket, info.Key), nil
 }
 
-func (s MinioService) PutFile(ctx *gin.Context) (string, error) {
-	file, err := ctx.FormFile("file")
+func (s MinioService) PutFile(ctx *gin.Context, name string) (string, error) {
+	file, err := ctx.FormFile(name)
 	if err != nil {
 		return "", fmt.Errorf("error with get form: %v", err)
 	}
@@ -64,7 +64,7 @@ func (s MinioService) PutFile(ctx *gin.Context) (string, error) {
 	defer fileReader.Close()
 
 	fileExt := filepath.Ext(file.Filename)
-	filename := fmt.Sprintf("%d%s", time.Now().UnixNano(), fileExt)
+	filename := fmt.Sprintf("%d%s", time.Now().UnixMicro(), fileExt)
 	info, err := s.client.PutObject(ctx, s.config.Bucket, filename, fileReader, file.Size, minio.PutObjectOptions{
 		ContentType: file.Header.Get("Content-Type"),
 	})
@@ -75,4 +75,9 @@ func (s MinioService) PutFile(ctx *gin.Context) (string, error) {
 	return fmt.Sprintf("%s/%s/%s", s.config.Domain, s.config.Bucket, info.Key), nil
 }
 
+func (s MinioService) Delete(fileURL string) error {
+	objectName := filepath.Base(fileURL)
+	return s.client.RemoveObject(context.Background(), s.config.Bucket, objectName, minio.RemoveObjectOptions{})
+}
+
 var _ Uploader = MinioService{}
diff --git a/api/service/oss/uploader.go b/api/service/oss/uploader.go
index 318f5746..1c8df952 100644
--- a/api/service/oss/uploader.go
+++ b/api/service/oss/uploader.go
@@ -3,6 +3,7 @@ package oss
 import "github.com/gin-gonic/gin"
 
 type Uploader interface {
-	PutFile(ctx *gin.Context) (string, error)
+	PutFile(ctx *gin.Context, name string) (string, error)
 	PutImg(imageURL string) (string, error)
+	Delete(fileURL string) error
 }
diff --git a/api/utils/upload.go b/api/utils/upload.go
index f614e740..d982c1d8 100644
--- a/api/utils/upload.go
+++ b/api/utils/upload.go
@@ -14,16 +14,16 @@ import (
 // GenUploadPath 生成上传文件路径
 func GenUploadPath(basePath, filename string) (string, error) {
 	now := time.Now()
-	dir := fmt.Sprintf("%s/upload/%d/%d", basePath, now.Year(), now.Month())
+	dir := fmt.Sprintf("%s/%d/%d", basePath, now.Year(), now.Month())
 	_, err := os.Stat(dir)
 	if err != nil {
 		err = os.MkdirAll(dir, 0755)
 		if err != nil {
-			return "", fmt.Errorf("创建上传目录失败：%s", err)
+			return "", fmt.Errorf("error with create upload dir：%v", err)
 		}
 	}
 	fileExt := filepath.Ext(filename)
-	return fmt.Sprintf("%s/%d%s", dir, now.UnixNano(), fileExt), nil
+	return fmt.Sprintf("%s/%d%s", dir, now.UnixMicro(), fileExt), nil
 }
 
 // GenUploadUrl 生成上传文件 URL