diff --git a/.clang-format b/.clang-format
index 402f22e..414ec4c 100644
--- a/.clang-format
+++ b/.clang-format
@@ -11,7 +11,7 @@ ReflowComments: true
 SpacesBeforeTrailingComments: 3
 TabWidth: 4
 ConstructorInitializerAllOnOneLineOrOnePerLine: true
-ColumnLimit: 80
+ColumnLimit: 100
 AllowShortBlocksOnASingleLine: Never
 AllowShortFunctionsOnASingleLine: None
 AllowShortEnumsOnASingleLine: false
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fec82c2..4668a02 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,5 +16,5 @@ set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib/${CMAKE_BUILD_TYPE})
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin/${CMAKE_BUILD_TYPE}/)
 
 add_subdirectory(lua)
-add_subdirectory(demo)
+add_subdirectory(fs)
 add_executable(elua main.cpp)
\ No newline at end of file
diff --git a/demo/CMakeLists.txt b/demo/CMakeLists.txt
deleted file mode 100644
index c14842a..0000000
--- a/demo/CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-cmake_minimum_required(VERSION 3.16)
-
-project(demo LANGUAGES CXX)
-set(CMAKE_CXX_STANDARD 17)
-
-if (MSVC)
-    add_compile_options(/source-charset:utf-8)
-endif()
-
-add_library(demo SHARED lib.h lib.cxx)
-target_link_libraries(demo PRIVATE lua)
\ No newline at end of file
diff --git a/demo/lib.cxx b/demo/lib.cxx
deleted file mode 100644
index eff5d9e..0000000
--- a/demo/lib.cxx
+++ /dev/null
@@ -1,16 +0,0 @@
-#include "lib.h"
-
-int c_multiply(lua_State* L)
-{
-    double a = luaL_checknumber(L, 1);
-    double b = luaL_checknumber(L, 2);
-    lua_pushnumber(L, a * b);
-    return 1;
-}
-
-// 注册 C 函数
-int luaopen_mylib(lua_State* L)
-{
-    lua_register(L, "c_multiply", c_multiply);   // 注册为全局函数
-    return 0;
-}
\ No newline at end of file
diff --git a/demo/lib.h b/demo/lib.h
deleted file mode 100644
index de3a4c5..0000000
--- a/demo/lib.h
+++ /dev/null
@@ -1,18 +0,0 @@
-#ifndef LIB_HEADER
-#define LIB_HEADER
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <lauxlib.h>
-#include <lua.h>
-#include <lualib.h>
-
-int luaopen_mylib(lua_State* L);
-int c_multiply(lua_State* L);
-
-#ifdef __cplusplus
-}
-#endif
-#endif
\ No newline at end of file
diff --git a/fs/CMakeLists.txt b/fs/CMakeLists.txt
new file mode 100644
index 0000000..dc40de4
--- /dev/null
+++ b/fs/CMakeLists.txt
@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(lua_fs LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 17)
+
+if (MSVC)
+    add_compile_options(/source-charset:utf-8)
+endif()
+
+add_library(lua_fs SHARED lib.h lib.cxx)
+target_link_libraries(lua_fs PRIVATE lua)
+target_compile_definitions(lua_fs PRIVATE FS_LIB_EXPORT)
\ No newline at end of file
diff --git a/fs/debug.bat b/fs/debug.bat
new file mode 100644
index 0000000..f09bab8
--- /dev/null
+++ b/fs/debug.bat
@@ -0,0 +1,2 @@
+@echo off
+cmd /k "set PATH=%PATH%;%~dp0..\build\bin\Debug"
\ No newline at end of file
diff --git a/fs/fs.lua b/fs/fs.lua
new file mode 100644
index 0000000..1b64b6a
--- /dev/null
+++ b/fs/fs.lua
@@ -0,0 +1,12 @@
+-- 加载模块
+local fs = require "lua_fs"
+
+print(fs.file_exists("D:\\download"))
+local files = fs.get_dir_files("D:\\download")
+if files then
+    for i, filename in ipairs(files) do
+        print(i, filename)  -- 输出索引和文件名
+    end
+else
+    print("Error:")
+end
\ No newline at end of file
diff --git a/fs/lib.cxx b/fs/lib.cxx
new file mode 100644
index 0000000..ba0ac38
--- /dev/null
+++ b/fs/lib.cxx
@@ -0,0 +1,75 @@
+#include "lib.h"
+#include <filesystem>
+#include <iostream>
+
+namespace fs = std::filesystem;
+
+static const luaL_Reg lua_fs[] = {
+    {"file_exists", file_exists}, {"is_regular_file", is_regular_file}, {"copy_file", copy_file},
+    {"delete_file", delete_file}, {"get_dir_files", get_dir_files},     {NULL, NULL}};
+
+int file_exists(lua_State* L)
+{
+    const char* path = luaL_checkstring(L, 1);
+    bool result = fs::exists(path);
+    lua_pushboolean(L, result);
+    return 1;
+}
+
+int is_regular_file(lua_State* L)
+{
+    const char* path = luaL_checkstring(L, 1);
+    bool result = fs::is_regular_file(path);
+    lua_pushboolean(L, result);
+    return 1;
+}
+
+int copy_file(lua_State* L)
+{
+    const char* source = luaL_checkstring(L, 1);
+    const char* destination = luaL_checkstring(L, 2);
+    bool result = fs::copy_file(source, destination);
+    lua_pushboolean(L, result);
+    return 1;
+}
+
+int delete_file(lua_State* L)
+{
+    const char* path = luaL_checkstring(L, 1);
+    bool result = fs::remove(path);
+    lua_pushboolean(L, result);
+    return 1;
+}
+
+int luaopen_lua_fs(lua_State* L)
+{
+    luaL_newlib(L, lua_fs);
+    return 1;
+}
+
+int get_dir_files(lua_State* L)
+{
+    // 获取第一个参数：目录路径
+    const char* dir_path = luaL_checkstring(L, 1);
+
+    // 检查目录是否存在
+    if (!fs::exists(dir_path) || !fs::is_directory(dir_path)) {
+        lua_pushnil(L);
+        lua_pushstring(L, "Invalid directory path");
+        return 2;   // 返回 nil 和错误信息
+    }
+
+    // 创建一个新的 Lua 表用于存放文件列表
+    lua_newtable(L);
+    int table_index = lua_gettop(L);   // 获取当前 Lua 表的位置
+
+    int index = 1;
+    for (const auto& entry : fs::directory_iterator(dir_path)) {
+        if (fs::is_regular_file(entry.status())) {
+            lua_pushstring(L, entry.path().filename().string().c_str());
+            lua_rawseti(L, table_index, index);
+            index++;
+        }
+    }
+    return 1;
+}
\ No newline at end of file
diff --git a/fs/lib.h b/fs/lib.h
new file mode 100644
index 0000000..e80d8e4
--- /dev/null
+++ b/fs/lib.h
@@ -0,0 +1,33 @@
+#ifndef LIB_HEADER
+#define LIB_HEADER
+
+#ifdef _WIN32
+#ifdef FS_LIB_EXPORT
+#define LIB_API __declspec(dllexport)
+#else
+#define LIB_API __declspec(dllimport)
+#endif
+#else
+#define LIB_API
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <lauxlib.h>
+#include <lua.h>
+#include <lualib.h>
+
+LIB_API int luaopen_lua_fs(lua_State* L);
+LIB_API int file_exists(lua_State* L);
+LIB_API int is_regular_file(lua_State* L);
+LIB_API int copy_file(lua_State* L);
+LIB_API int delete_file(lua_State* L);
+LIB_API int get_dir_files(lua_State* L);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif   // LIB_HEADER