diff --git a/History.md b/History.md
index 15d734e..a8c3e50 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,6 @@
+# 1.4.0 / 2020-09-19
+* [A] 增加esm模式
+
 # 1.3.2 / 2020-01-18
 * [U] 增加静默参数, 可以不打印错误日志(用于某些特殊场景)
 
diff --git a/index.js b/index.js
index 4418ce2..1453afe 100644
--- a/index.js
+++ b/index.js
@@ -4,15 +4,11 @@
  * @date    2015-12-28 14:28:38
  *
  */
-'use strict'
 
 const FS = require('fs')
 const PATH = require('path')
 
-const VERSION = +process.versions.node
-  .split('.')
-  .slice(0, 2)
-  .join('.')
+const VERSION = +process.versions.node.split('.').slice(0, 2).join('.')
 
 const Iofs = {
   origin: FS,
diff --git a/index.mjs b/index.mjs
new file mode 100644
index 0000000..4adc00f
--- /dev/null
+++ b/index.mjs
@@ -0,0 +1,265 @@
+/**
+ * @author yutent<yutent.io@gmail.com>
+ * @date 2020/09/19 16:39:59
+ */
+
+import FS from 'fs'
+import PATH from 'path'
+
+const VERSION = +process.versions.node.split('.').slice(0, 2).join('.')
+
+export default {
+  origin: FS,
+
+  /**
+   * [cat 文件读取]
+   * @param  {String} file [文件路径]
+   * @param  {Function} cb   [回调] 可选
+   */
+  cat(file, silently) {
+    try {
+      return FS.readFileSync(file)
+    } catch (err) {
+      !silently && console.error('call cat(): ', err + '')
+      return null
+    }
+  },
+
+  /**
+   * [ls 读取整个目录(不遍历子目录)]
+   * @param  {string} dir [目标路径]
+   * @param  {boolean} recursive [是否递归遍历子目录]
+   * @return {array}      [返回目标目录所有文件名和子目录名, 不包括'.'和'..']
+   */
+  ls(dir, recursive, silently) {
+    try {
+      var list = FS.readdirSync(dir)
+
+      list.forEach((it, i) => {
+        list[i] = PATH.resolve(dir, it)
+      })
+
+      if (recursive) {
+        var tmp = list.concat()
+        tmp.forEach(it => {
+          if (this.isdir(it)) {
+            list = list.concat(this.ls(it, true))
+          }
+        })
+      }
+      return list
+    } catch (err) {
+      !silently && console.error('call ls(): ', err + '')
+      return null
+    }
+  },
+
+  /**
+   * [echo 写文件]
+   * @param  {String|Buffer|Number} data   [要写入的数据]
+   * @param  {String} file   [要写的文件]
+   * @param  {Boolean} append [是否在后面追加，默认否]
+   * @param  {String} encode [编码, 默认utf8]
+   */
+  echo(data, file, append, encode, silently) {
+    if (!file) {
+      return data
+    }
+
+    var updir = PATH.parse(file).dir
+    var opt = {}
+    if (!this.isdir(updir)) {
+      this.mkdir(updir)
+    }
+
+    if (append && typeof append === 'string') {
+      encode = append
+      append = false
+      opt.encoding = encode
+    } else {
+      if (typeof encode === 'string') {
+        opt.encoding = encode
+      }
+    }
+
+    try {
+      if (!!append) {
+        FS.appendFileSync(file, data, opt)
+      } else {
+        FS.writeFileSync(file, data, opt)
+      }
+      return true
+    } catch (err) {
+      !silently && console.error('call echo(): ', err + '')
+      return false
+    }
+  },
+
+  //修改权限
+  chmod(path, mode, silently) {
+    try {
+      FS.chmodSync(path, mode)
+      return true
+    } catch (err) {
+      !silently && console.error('call chmod(): ', err + '')
+      return false
+    }
+  },
+
+  //修改所属用户
+  chown(path, uid, gid, silently) {
+    try {
+      FS.chownSync(path, uid, gid)
+      return true
+    } catch (err) {
+      !silently && console.error('call chown(): ', err + '')
+      return false
+    }
+  },
+
+  /**
+   * [mv 移动文件&目录,兼具重命名功能]
+   * @param  {String} origin [原路径/原名]
+   * @param  {String} target   [目标路径/新名]
+   */
+  mv(origin, target, silently) {
+    var updir = PATH.parse(target).dir
+    if (!this.isdir(updir)) {
+      this.mkdir(updir)
+    }
+
+    try {
+      FS.renameSync(origin, target)
+    } catch (err) {
+      if (~err.message.indexOf('cross-device')) {
+        if (this.cp(origin, target)) {
+          return this.rm(origin)
+        }
+        return false
+      }
+      !silently && console.error('call mv(): ', err + '')
+      return false
+    }
+  },
+
+  /**
+   * [cp 复制文件&目录]
+   * @param  {String} origin [原路径]
+   * @param  {String} target   [目标路径]
+   */
+  cp(origin, target, silently) {
+    try {
+      // 如果是目录, 则递归操作
+      if (this.isdir(origin)) {
+        this.mkdir(target)
+        var list = this.ls(origin)
+        list.forEach(val => {
+          let name = PATH.parse(val).base
+          this.cp(val, PATH.join(target, name))
+        })
+      } else {
+        var updir = PATH.parse(target).dir
+        if (!this.isdir(updir)) {
+          this.mkdir(updir)
+        }
+
+        var rs = FS.createReadStream(origin)
+        var ws = FS.createWriteStream(target)
+        rs.pipe(ws)
+      }
+
+      return true
+    } catch (err) {
+      !silently && console.error('call cp(): ', err + '')
+      return false
+    }
+  },
+
+  /**
+   * [rm 删除文件/目录]
+   * @param  {[type]} origin      [源文件/目录路径]
+   */
+  rm(origin, silently) {
+    try {
+      if (this.isdir(origin)) {
+        if (VERSION > 12.1) {
+          FS.rmdirSync(origin, { recursive: true })
+        } else {
+          var list = this.ls(origin)
+          list.forEach(it => this.rm(it))
+          FS.rmdirSync(origin)
+        }
+      } else {
+        FS.unlinkSync(origin)
+      }
+      return true
+    } catch (err) {
+      !silently && console.error('call rm(): ', err + '')
+      return false
+    }
+  },
+
+  /**
+   * [stat 返回文件/目录的状态信息]
+   * @param  {[string]} path [目标路径]
+   * @param  {[boolean]} silently [是否静默检测, 是否不打印错误日志]
+   */
+  stat(path, silently) {
+    try {
+      return FS.statSync(path)
+    } catch (err) {
+      !silently && console.error('call stat(): ', err + '')
+      return Object.create(null)
+    }
+  },
+
+  /**
+   * [isdir 判断目标是否为目录]
+   * @param  {String} path [目标路径]
+   */
+  isdir(path) {
+    try {
+      return this.stat(path, true).isDirectory()
+    } catch (err) {
+      return false
+    }
+  },
+
+  /**
+   * [mkdir 新建目录]
+   * @param  {String} dir [目标路径]
+   * @param {Number} mode [目录权限, node v10.12起支持]
+   */
+  mkdir(dir, mode = 0o755, silently) {
+    try {
+      if (VERSION > 10.12) {
+        FS.mkdirSync(dir, { recursive: true, mode: mode })
+      } else {
+        var updir = PATH.parse(dir).dir
+        if (!updir) {
+          !silently && console.error('call mkdir(): ', 'Wrong dir path')
+          return false
+        }
+
+        if (!this.isdir(updir)) {
+          this.mkdir(updir)
+        }
+
+        FS.mkdirSync(dir)
+        this.chmod(dir, mode)
+      }
+      return true
+    } catch (err) {
+      !silently && console.error('call mkdir(): ', err + '')
+      return false
+    }
+  },
+
+  /**
+   * [exists 判断目标(文件/目录)是否存在]
+   * @param  {String} file [目标路径]
+   */
+  exists(file) {
+    return FS.existsSync(file)
+  }
+}
diff --git a/package.json b/package.json
index 77ff66d..0cc9c69 100644
--- a/package.json
+++ b/package.json
@@ -1,11 +1,11 @@
 {
   "name": "iofs",
-  "version": "1.3.2",
-  "description": "Base on native fs module, for easy using.",
+  "version": "1.4.0",
+  "description": "iofs是一个基于原生fs模块封装的工具, 旨在提供更加方便实用一些常用的API方法(同步), API习惯参考了bash shell。",
   "main": "index.js",
   "repository": {
     "type": "git",
-    "url": "https://github.com/yutent/iofs.git"
+    "url": "https://github.com/bytedo/iofs.git"
   },
   "keywords": [
     "fivejs",