diff --git a/library/think/Env.php b/library/think/Env.php
new file mode 100644
index 00000000..a23d9925
--- /dev/null
+++ b/library/think/Env.php
@@ -0,0 +1,31 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think;
+
+class Env
+{
+    /**
+     * 获取环境变量值
+     * @param string    $name 环境变量名（支持二级 .号分割）
+     * @param string    $default  默认值
+     * @return mixed
+     */
+    public static function get($name, $default = null)
+    {
+        $result = getenv(ENV_PREFIX . strtoupper(str_replace('.', '_', $name)));
+        if (false !== $result) {
+            return $result;
+        } else {
+            return $default;
+        }
+    }
+}