diff --git a/app/langs/zh-CN.json b/app/langs/zh-CN.json
index 3eac07f..f15d9e8 100644
--- a/app/langs/zh-CN.json
+++ b/app/langs/zh-CN.json
@@ -122,6 +122,11 @@
         "settings.file-count": "({{count}} 个文件)",
         "settings.total-count": "(共计: {{count}}个)"
     },
+    "rpc": {
+        "error": {
+            "Unauthorized": "认证失败!"
+        }
+    },
     "options": {
         "dir.name": "下载路径",
         "dir.description": "",
diff --git a/app/scripts/config/language-default.js b/app/scripts/config/language-default.js
index a75b335..0eddb95 100644
--- a/app/scripts/config/language-default.js
+++ b/app/scripts/config/language-default.js
@@ -126,6 +126,11 @@
                 'settings.file-count': '({{count}} Files)',
                 'settings.total-count': '(Total Count: {{count}})'
             },
+            'rpc': {
+                'error': {
+                    'Unauthorized': 'Authorization Failed!'
+                }
+            },
             'options': {
                 'dir.name': 'Download Path',
                 'dir.description': '',
diff --git a/app/scripts/services/aria2HttpRpcService.js b/app/scripts/services/aria2HttpRpcService.js
index e4e235f..a104743 100644
--- a/app/scripts/services/aria2HttpRpcService.js
+++ b/app/scripts/services/aria2HttpRpcService.js
@@ -29,6 +29,10 @@
                         return;
                     }
 
+                    if (context.errorCallback) {
+                        context.errorCallback(data.error);
+                    }
+
                     if (context.callback) {
                         context.callback(data.error);
                     }
diff --git a/app/scripts/services/aria2RpcService.js b/app/scripts/services/aria2RpcService.js
index c0a629a..0cb83aa 100644
--- a/app/scripts/services/aria2RpcService.js
+++ b/app/scripts/services/aria2RpcService.js
@@ -38,6 +38,19 @@
                 context.requestBody.params = finalParams;
             }
 
+            if (!context.silent) {
+                context.errorCallback = function (error) {
+                    if (!error || !error.message) {
+                        return;
+                    }
+
+                    if (error.message == 'Unauthorized') {
+                        ariaNgCommonService.alert('rpc.error.' + error.message);
+                        return;
+                    }
+                }
+            }
+
             if (protocol == 'ws' || protocol == 'wss') {
                 return aria2WebSocketRpcService.request(context);
             } else {
diff --git a/app/scripts/services/aria2WebSocketRpcService.js b/app/scripts/services/aria2WebSocketRpcService.js
index a3a1ae2..63ca788 100644
--- a/app/scripts/services/aria2WebSocketRpcService.js
+++ b/app/scripts/services/aria2WebSocketRpcService.js
@@ -34,18 +34,21 @@
                     }
 
                     var context = state.context;
-                    var callbackMethod = context.callback;
 
                     state.deferred.resolve({
                         success: true,
                         context: context
                     });
 
-                    if (callbackMethod) {
+                    if (content.error && context.errorCallback) {
+                        context.errorCallback(content.error);
+                    }
+
+                    if (context.callback) {
                         if (content.result) {
-                            callbackMethod(content.result);
+                            context.callback(content.result);
                         } else if (content.error) {
-                            callbackMethod(content.error);
+                            context.callback(content.error);
                         }
                     }