diff --git a/module/mr/control.php b/module/mr/control.php
index 4c9450be56..12ad6a9ef5 100644
--- a/module/mr/control.php
+++ b/module/mr/control.php
@@ -174,8 +174,19 @@ class mr extends control
     public function accept($MRID)
     {
         $MR = $this->mr->getByID($MRID);
-        if(isset($MR->gitlabID)) $rawMR = $this->mr->apiAcceptMR($MR->gitlabID, $MR->targetProject, $MR->mriid);
+
+        /* Accept MR by using the mapped user in GitLab. */
+        $sudoUser = $this->mr->getSudoUsername($MR->gitlabID, $MR->targetProject);
+
+        if(isset($MR->gitlabID))
+        {
+            if(!empty($sudoUser)) $rawMR = $this->mr->apiAcceptMR($MR->gitlabID, $MR->targetProject, $MR->mriid, $sudo = $sudoUser);
+            if(empty($sudoUser))  $rawMR = $this->mr->apiAcceptMR($MR->gitlabID, $MR->targetProject, $MR->mriid);
+        }
         if(isset($rawMR->state) and $rawMR->state == 'merged') return array('result' => 'success', 'message' => $this->lang->mr->mergeSuccess);
+
+        /* The type of variable `$rawMR->message` is string. This is different with apiCreateMR. */
+        if(isset($rawMR->message)) return array('result' => 'fail', 'message' => sprintf($this->lang->mr->apiError->sudo, $rawMR->message));
         return array('result' => 'fail', 'message' => $this->lang->mr->mergeFailed);
     }
 
diff --git a/module/mr/lang/zh-cn.php b/module/mr/lang/zh-cn.php
index 9a83adbd96..92bfc96367 100644
--- a/module/mr/lang/zh-cn.php
+++ b/module/mr/lang/zh-cn.php
@@ -44,6 +44,7 @@ $lang->mr->notFound  = "此{$lang->mr->common}不存在。";
 
 $lang->mr->apiError = new stdclass;
 $lang->mr->apiError->createMR = "通过API创建合并请求失败，失败原因：%s";
+$lang->mr->apiError->sudo     = "无法以当前用户绑定的GitLab账户进行操作，失败原因：%s";
 
 $lang->mr->createFailedFromAPI = "创建合并请求失败。";
 $lang->mr->accessGitlabFailed  = "当前无法连接到GitLab服务器。";
@@ -72,7 +73,6 @@ $lang->mr->acceptMR       = "合并";
 $lang->mr->mergeFailed    = "无法合并，请核对合并请求状态";
 $lang->mr->mergeSuccess   = "已成功合并";
 
-
 /**
  * Merge Command Document.
  *