diff --git a/system/storage.php b/system/storage.php
index 12c35cb..2180d76 100644
--- a/system/storage.php
+++ b/system/storage.php
@@ -1,4 +1,75 @@
 <?php
+/**
+ * @file stroage.php
+ * @date 2018-05-05
+ * @author Go Namhyeon <gnh1201@gmail.com>
+ * @brief Stroage module
+ */
+
+if(function_exists("get_storage_dir")) {
+	function get_storage_dir() {
+		$config = get_config();
+		return get_value_in_array("storage_dir", $config, "storage");
+	}
+}
+
+if(!function_exists("get_storage_path")) {
+	function get_storage_path($type) {
+		return sprintf("./%s/%s", get_storage_dir(), $type);
+	}
+}
+
+if(!function_exists("get_storage_url")) {
+	function get_storage_url($type) {
+		return sprintf("%s%s/%s", base_url(), get_storage_dir(), $type);
+	}
+}
+
+if(!function_exists("move_uploaded_file_to_storage")) {
+	function move_uploaded_file_to_stroage($type="data", $image=false) {
+		$response = array("files" => array());
+
+		$upload_base_dir = get_storage_path($type);
+		$upload_base_url = get_storage_url($type);
+
+		if($image == true) {
+			$upload_allow_ext = array("png", "gif", "jpg", "jpeg", "tif");
+		} else {
+			$upload_allow_ext = array();
+		}
+
+		foreach($requests['files'] as $k=>$file) {
+			$upload_ext = pathinfo($requests['files'][$k]['name'], PATHINFO_EXTENSION);
+			$upload_name = make_random_id(10) . (empty($upload_ext) ? "" : "." . $upload_ext);
+			$upload_file = $upload_base_dir . $upload_name;
+			$upload_url = $upload_base_url . $upload_name;
+
+			if(count($upload_allow_ext) == 0 || in_array($upload_ext, $upload_allow_ext)) {
+				if(move_uploaded_file($requests['files'][$k]['tmp_name'], $upload_file)) {
+					$response['files'][] = array(
+						"upload_ext" => $upload_ext,
+						"upload_name" => $upload_name,
+						"upload_file" => $upload_file,
+						"upload_url" => $upload_url,
+						"upload_error" => ""
+					);
+				} else {
+					$response['files'][] = array(
+						"upload_error" => "File write error."
+					);
+				}
+			} else {
+				$response['files'][] = array(
+					"upload_error" => "Not allowed file type."
+				);
+			}
+		}
+
+		return $response['files'];
+	}
+}
+
+
 function read_storage_file($filename, $offset=0, $length=0) {
     // todo
 }