diff --git a/app/Jobs/CheckHostIfExistsOnModule.php b/app/Jobs/CheckHostIfExistsOnModule.php
index 696dcab..430ed3a 100644
--- a/app/Jobs/CheckHostIfExistsOnModule.php
+++ b/app/Jobs/CheckHostIfExistsOnModule.php
@@ -32,11 +32,15 @@ public function __construct()
      */
     public function handle()
     {
-        // now 添加1.5小时
-
-        //
+        // 删除所有模块中不存在的主机
         Host::with('module')->where('created_at', '<', now()->subHour())->chunk(100, function ($hosts) {
             foreach ($hosts as $host) {
+
+                // 忽略维护中的模块
+                if ($host->module->status !== 'up') {
+                    continue;
+                }
+
                 $http = Http::module($host->module->api_token, $host->module->url);
                 $response = $http->get('hosts/' . $host->id);
 
diff --git a/app/Jobs/Module/FetchModule.php b/app/Jobs/Module/FetchModule.php
index 5615488..9de1e04 100644
--- a/app/Jobs/Module/FetchModule.php
+++ b/app/Jobs/Module/FetchModule.php
@@ -58,7 +58,6 @@ public function handle()
                     continue;
                 }
 
-
                 if ($response->successful()) {
                     $json = $response->json();
 
@@ -82,6 +81,18 @@ public function handle()
                     // $module->update([
                     //     'data' => $response->json()
                     // ]);
+                } else {
+
+                    // if module return maintenance, then set module status to maintenance
+                    if ($response->status() == 503) {
+                        $module->update([
+                            'status' => 'maintenance'
+                        ]);
+                    } else {
+                        $module->update([
+                            'status' => 'down'
+                        ]);
+                    }
                 }
             }