diff --git a/routers/modelapp/desensitization.go b/routers/modelapp/desensitization.go
index 8cdc744cf..9de33526e 100644
--- a/routers/modelapp/desensitization.go
+++ b/routers/modelapp/desensitization.go
@@ -2,9 +2,11 @@ package modelapp
 
 import (
 	"bytes"
+	"code.gitea.io/gitea/models"
 	"crypto/tls"
 	"image"
 	"image/png"
+	"net/http"
 	"strconv"
 
 	"code.gitea.io/gitea/modules/setting"
@@ -17,7 +19,7 @@ import (
 
 var restyClient *resty.Client
 var tplExploreUpload base.TplName = "model/tuomin/upload"
-var uploadUrl string = "/extension/tuomin/upload"
+var uploadUrl = "/extension/tuomin/upload"
 var allowedContentType = []string{"image/jpeg", "image/jpg", "image/png"}
 
 func ProcessImageUI(ctx *context.Context) {
@@ -28,8 +30,7 @@ func ProcessImage(ctx *context.Context) {
 
 	file, header, err := ctx.GetFile("file")
 	if err != nil {
-		ctx.Flash.Error(ctx.Tr("model_app.get_file_fail"))
-		ctx.Redirect(setting.AppSubURL + uploadUrl)
+		ctx.JSON(http.StatusBadRequest,models.BaseErrorMessage(ctx.Tr("model_app.get_file_fail")))
 		return
 	}
 	defer file.Close()
@@ -37,8 +38,7 @@ func ProcessImage(ctx *context.Context) {
 	contentType := header.Header.Get("Content-Type")
 
 	if !isInAllowedContentType(contentType) {
-		ctx.Flash.Error(ctx.Tr("model_app.content_type_unsupported"))
-		ctx.Redirect(setting.AppSubURL + uploadUrl)
+		ctx.JSON(http.StatusBadRequest,models.BaseErrorMessage(ctx.Tr("model_app.content_type_unsupported")))
 		return
 	}
 
@@ -46,14 +46,12 @@ func ProcessImage(ctx *context.Context) {
 	res, err := client.R().SetMultipartField(
 		"file", header.Filename, contentType, file).Post(setting.ModelApp.DesensitizationUrl + "?mode=" + strconv.Itoa(ctx.QueryInt("mode")))
 	if err != nil {
-		ctx.Flash.Error(ctx.Tr("model_app.process_image_fail"))
-		ctx.Redirect(setting.AppSubURL  + uploadUrl)
+		ctx.JSON(http.StatusBadRequest,models.BaseErrorMessage(ctx.Tr("model_app.process_image_fail")))
 		return
 	}
 	image, _, err := image.Decode(bytes.NewReader(res.Body()))
 	if err != nil {
-		ctx.Flash.Error(ctx.Tr("model_app.process_image_fail"))
-		ctx.Redirect(setting.AppSubURL + uploadUrl)
+		ctx.JSON(http.StatusBadRequest,models.BaseErrorMessage(ctx.Tr("model_app.process_image_fail")))
 		return
 	}
 
diff --git a/web_src/vuepages/pages/model/tuomin/index.vue b/web_src/vuepages/pages/model/tuomin/index.vue
index 65a27ead3..7ba55165c 100644
--- a/web_src/vuepages/pages/model/tuomin/index.vue
+++ b/web_src/vuepages/pages/model/tuomin/index.vue
@@ -184,11 +184,32 @@
           this.tranformImageLoading = false
         }).catch(err => {
           console.log(err);
-          this.tranformImageLoading = false
+
+          this.tranformImageLoading = false;
+          if (err.response.status === 400) {
+               const fr = new FileReader();
+               fr.onload = (e) => {
+                 try {
+                   const jsonResult = JSON.parse(e.target.result);
+                   this.$message({
+                     type: 'error',
+                     message: jsonResult.Message
+                   });
+                 } catch (e) {
+                   this.$message({
+                     type: 'error',
+                     message: this.$t('tranformImageFailed')
+                   });
+                 }
+               };
+               fr.readAsText(err.response.data);
+          }else{
+
           this.$message({
             type: 'error',
             message: this.$t('tranformImageFailed')
           });
+          }
         })
 
       },