diff --git a/library/think/App.php b/library/think/App.php
index e188223f..136d6930 100644
--- a/library/think/App.php
+++ b/library/think/App.php
@@ -79,9 +79,6 @@ class App
             Session::init($config['session']);
         }
 
-        // 日志初始化
-        Log::init($config['log']);
-
         if (empty(self::$dispatch['type'])) {
             // 未指定调度类型 则进行URL路由检测
             self::route($config);
diff --git a/library/think/Log.php b/library/think/Log.php
index 6c62b871..aaecfbf2 100644
--- a/library/think/Log.php
+++ b/library/think/Log.php
@@ -80,6 +80,9 @@ class Log
      */
     public static function save()
     {
+        if (is_null(self::$driver)) {
+            self::init(Config::get('log'));
+        }
         self::$driver->save(self::$log);
     }
 
@@ -99,6 +102,9 @@ class Log
 
         // 监听log_write
         APP_HOOK && Hook::listen('log_write', $log);
+        if (is_null(self::$driver)) {
+            self::init(Config::get('log'));
+        }
         // 写入日志
         self::$driver->save($log);
     }