diff --git a/.autod.conf b/.autod.conf
index d5d0bbd3..6ccc1a3d 100644
--- a/.autod.conf
+++ b/.autod.conf
@@ -13,6 +13,7 @@ module.exports = {
     'co-mocha',
     'intelli-espower-loader',
     'power-assert',
+    'espower-typescript',
     'ypkgfiles',
   ],
   devdep: [
diff --git a/.gitignore b/.gitignore
index 348042ed..f22ee7c5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,10 +1,18 @@
 node_modules/
 coverage/
-!test/fixtures/custom-framework-app/node_modules/
+test/fixtures/custom-framework-app/node_modules/
+
+test/fixtures/demo-app/node_modules/aliyun-egg/
 !test/fixtures/demo-app/node_modules/aliyun-egg/node_modules/
+
+test/fixtures/ts/node_modules/aliyun-egg/
+!test/fixtures/ts/node_modules/aliyun-egg/node_modules/
+
 !test/fixtures/test-files-glob/**
 !test/fixtures/test-files-stack/node_modules/
 !test/fixtures/example/node_modules/
+
+
 **/run/*.json
 .tmp
 .vscode
diff --git a/README.md b/README.md
index 3e10ed6f..c7637d8d 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,8 @@ $ egg-bin dev
 - `--port` server port, default to `7001`.
 - `--cluster` worker process number, skip this argvs will start only `1` worker, provide this without value will start `cpu` count worker.
 - `--sticky` start a sticky cluster server, default to `false`.
+- `--typescript` / `--ts` enable typescript support, default to `false`.
+- `--require` will add to `execArgv`, support multiple.
 
 ### debug
 
@@ -130,6 +132,7 @@ You can pass any mocha argv.
 - `--grep` only run tests matching <pattern>
 - `--timeout` milliseconds, default to 30000
 - `--full-trace` display the full stack trace, default to false.
+- `--typescript` / `--ts` enable typescript support, default to `false`.
 - see more at https://mochajs.org/#usage
 
 #### environment
diff --git a/lib/cmd/dev.js b/lib/cmd/dev.js
index 1292475a..42643c09 100644
--- a/lib/cmd/dev.js
+++ b/lib/cmd/dev.js
@@ -33,6 +33,11 @@ class DevCommand extends Command {
         description: 'specify framework that can be absolute path or npm package',
         type: 'string',
       },
+      require: {
+        description: 'will add to execArgv --require',
+        type: 'array',
+        alias: 'r',
+      },
     };
   }
 
@@ -40,6 +45,18 @@ class DevCommand extends Command {
     return 'Start server at local dev mode';
   }
 
+  get context() {
+    const context = super.context;
+    const { argv, execArgvObj } = context;
+    execArgvObj.require = execArgvObj.require || [];
+    // add require to execArgv
+    if (argv.require) {
+      execArgvObj.require.push(...argv.require);
+      argv.require = undefined;
+    }
+    return context;
+  }
+
   * run(context) {
     const devArgs = yield this.formatArgs(context);
     const options = {
diff --git a/lib/cmd/test.js b/lib/cmd/test.js
index dd04ef6a..e2c6554a 100644
--- a/lib/cmd/test.js
+++ b/lib/cmd/test.js
@@ -85,13 +85,19 @@ class TestCommand extends Command {
       requireArr.push(require.resolve('intelli-espower-loader'));
     }
 
+    // for power-assert
+    if (testArgv.typescript) {
+      requireArr.push('espower-typescript/guess');
+    }
+
     testArgv.require = requireArr;
 
     // collect test files
     let files = testArgv._.slice();
     if (!files.length) {
-      files = [ process.env.TESTS || 'test/**/*.test.js' ];
+      files = [ process.env.TESTS || `test/**/*.test.${testArgv.typescript ? 'ts' : 'js'}` ];
     }
+
     // expand glob and skip node_modules and fixtures
     files = globby.sync(files.concat('!test/**/{fixtures, node_modules}/**/*.test.js'));
     files.sort();
@@ -108,6 +114,7 @@ class TestCommand extends Command {
     testArgv.r = undefined;
     testArgv.t = undefined;
     testArgv.g = undefined;
+    testArgv.typescript = undefined;
 
     return this.helper.unparseArgv(testArgv);
   }
diff --git a/lib/command.js b/lib/command.js
index 096a9966..a52b8758 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -1,5 +1,6 @@
 'use strict';
 
+const path = require('path');
 const BaseCommand = require('common-bin');
 
 class Command extends BaseCommand {
@@ -9,16 +10,33 @@ class Command extends BaseCommand {
       execArgv: true,
       removeAlias: true,
     };
+
+    // common-bin setter, don't care about override at sub class
+    // https://github.com/node-modules/common-bin/blob/master/lib/command.js#L158
+    this.options = {
+      typescript: {
+        description: 'whether enable typescript support, will load `ts-node/register` etc',
+        type: 'boolean',
+        alias: 'ts',
+      },
+    };
   }
 
   get context() {
     const context = super.context;
+    const { argv, debugPort, execArgvObj } = context;
 
     // compatible
-    if (context.debugPort) context.debug = context.debugPort;
+    if (debugPort) context.debug = debugPort;
 
     // remove unuse args
-    context.argv.$0 = undefined;
+    argv.$0 = undefined;
+
+    // execArgv
+    if (argv.typescript) {
+      execArgvObj.require = execArgvObj.require || [];
+      execArgvObj.require.push(path.join(__dirname, './ts-helper.js'));
+    }
 
     return context;
   }
diff --git a/lib/ts-helper.js b/lib/ts-helper.js
new file mode 100644
index 00000000..8121e4cd
--- /dev/null
+++ b/lib/ts-helper.js
@@ -0,0 +1,28 @@
+'use strict';
+
+require('ts-node').register({
+  typeCheck: true,
+  compilerOptions: {
+    target: 'es2017',
+    module: 'commonjs',
+    strict: true,
+    moduleResolution: 'node',
+    noImplicitAny: false,
+    experimentalDecorators: true,
+    emitDecoratorMetadata: true,
+    charset: 'utf8',
+    allowJs: false,
+    pretty: true,
+    noEmitOnError: false,
+    noUnusedLocals: true,
+    noUnusedParameters: true,
+    allowUnreachableCode: false,
+    allowUnusedLabels: false,
+    strictPropertyInitialization: false,
+    noFallthroughCasesInSwitch: true,
+    skipLibCheck: true,
+    skipDefaultLibCheck: true,
+    inlineSourceMap: true,
+    importHelpers: true,
+  },
+});
diff --git a/package.json b/package.json
index 60159475..4c0b48c7 100644
--- a/package.json
+++ b/package.json
@@ -9,24 +9,27 @@
   },
   "dependencies": {
     "autod": "^3.0.1",
-    "chalk": "^2.3.1",
-    "co-mocha": "^1.2.1",
-    "common-bin": "^2.7.1",
+    "chalk": "^2.3.2",
+    "co-mocha": "^1.2.2",
+    "common-bin": "^2.7.2",
     "debug": "^3.1.0",
     "detect-port": "^1.2.2",
     "egg-utils": "^2.3.0",
     "globby": "^8.0.1",
     "inspector-proxy": "^1.2.1",
     "intelli-espower-loader": "^1.0.1",
-    "mocha": "^5.0.1",
+    "espower-typescript": "^8.1.3",
+    "mocha": "^5.0.5",
     "mz-modules": "^2.1.0",
-    "nyc": "^11.4.1",
+    "nyc": "^11.6.0",
     "power-assert": "^1.4.4",
     "semver": "^5.5.0",
-    "test-exclude": "^4.2.0",
+    "test-exclude": "^4.2.1",
+    "ts-node": "^5.0.1",
     "ypkgfiles": "^1.5.0"
   },
   "devDependencies": {
+    "@types/mocha": "^5.0.0",
     "autod": "^3.0.1",
     "babel": "^6.3.26",
     "babel-preset-airbnb": "^1.0.1",
@@ -35,7 +38,7 @@
     "cross-env": "^3.1.3",
     "egg": "^1.8.0",
     "egg-ci": "^1.8.0",
-    "egg-mock": "^3.14.0",
+    "egg-mock": "^3.15.1",
     "enzyme": "^2.0.0",
     "eslint": "^4.12.1",
     "eslint-config-egg": "^7.0.0",
diff --git a/test/fixtures/require-script.js b/test/fixtures/require-script.js
new file mode 100644
index 00000000..00d46285
--- /dev/null
+++ b/test/fixtures/require-script.js
@@ -0,0 +1,3 @@
+'use strict';
+
+console.log('hey, you require me by --require');
diff --git a/test/fixtures/ts/app.js b/test/fixtures/ts/app.js
new file mode 100644
index 00000000..e46106f7
--- /dev/null
+++ b/test/fixtures/ts/app.js
@@ -0,0 +1,6 @@
+'use strict';
+
+
+module.exports = app => {
+  app.logger.info('###', require('./test.ts').default.name);
+};
diff --git a/test/fixtures/ts/config/config.default.js b/test/fixtures/ts/config/config.default.js
new file mode 100644
index 00000000..762c2647
--- /dev/null
+++ b/test/fixtures/ts/config/config.default.js
@@ -0,0 +1,3 @@
+'use strict';
+
+exports.key = '12345';
diff --git a/test/fixtures/ts/node_modules/aliyun-egg/index.js b/test/fixtures/ts/node_modules/aliyun-egg/index.js
new file mode 100644
index 00000000..c1500965
--- /dev/null
+++ b/test/fixtures/ts/node_modules/aliyun-egg/index.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const egg = require('../../../../../node_modules/egg');
+
+module.exports = Object.assign({}, egg);
+
+module.exports.startCluster = options => {
+  console.log('options.typescript=%s', options.typescript);
+  console.log('options: %j', options);
+  if (process.execArgv.length) {
+    console.log('process.execArgv:', process.execArgv);
+  }
+
+  // make sure exit
+  setTimeout(() => {
+    console.log('exit by master test end')
+    process.exit(0);
+  }, 5000);
+  return egg.startCluster(options);
+};
diff --git a/test/fixtures/ts/node_modules/aliyun-egg/package.json b/test/fixtures/ts/node_modules/aliyun-egg/package.json
new file mode 100644
index 00000000..4e36e661
--- /dev/null
+++ b/test/fixtures/ts/node_modules/aliyun-egg/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "aliyun-egg",
+  "dependencies": {
+    "egg": "*"
+  }
+}
diff --git a/test/fixtures/ts/package.json b/test/fixtures/ts/package.json
new file mode 100644
index 00000000..3cb71fd5
--- /dev/null
+++ b/test/fixtures/ts/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "ts",
+  "egg": {
+    "framework": "aliyun-egg"
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/ts/test.ts b/test/fixtures/ts/test.ts
new file mode 100644
index 00000000..61519692
--- /dev/null
+++ b/test/fixtures/ts/test.ts
@@ -0,0 +1,3 @@
+'use strict';
+
+export default { name: 'egg from ts' };
diff --git a/test/fixtures/ts/test/a.test.js b/test/fixtures/ts/test/a.test.js
new file mode 100644
index 00000000..32c1eddc
--- /dev/null
+++ b/test/fixtures/ts/test/a.test.js
@@ -0,0 +1,7 @@
+'use strict';
+
+describe('a.test.js', () => {
+  it('should success', () => {
+    throw 'should not load js files';
+  });
+});
diff --git a/test/fixtures/ts/test/sub.ts b/test/fixtures/ts/test/sub.ts
new file mode 100644
index 00000000..61519692
--- /dev/null
+++ b/test/fixtures/ts/test/sub.ts
@@ -0,0 +1,3 @@
+'use strict';
+
+export default { name: 'egg from ts' };
diff --git a/test/fixtures/ts/test/typescript.test.ts b/test/fixtures/ts/test/typescript.test.ts
new file mode 100644
index 00000000..afe066d7
--- /dev/null
+++ b/test/fixtures/ts/test/typescript.test.ts
@@ -0,0 +1,17 @@
+'use strict';
+
+const assert = require('assert');
+
+describe('typescript.test.ts', () => {
+  it('should success', () => {
+    const obj = require('./sub');
+    console.log('###', obj.default.name);
+    assert(obj.default.name === 'egg from ts');
+  });
+
+  it('should fail', () => {
+    const obj = require('./sub');
+    console.log('###', obj.default.name);
+    assert(obj.default.name === 'wrong assert ts');
+  });
+});
diff --git a/test/lib/cmd/dev.test.js b/test/lib/cmd/dev.test.js
index cdaf7c13..230d5dca 100644
--- a/test/lib/cmd/dev.test.js
+++ b/test/lib/cmd/dev.test.js
@@ -137,4 +137,14 @@ describe('test/lib/cmd/dev.test.js', () => {
       .expect('code', 0)
       .end(done);
   });
+
+  it('should support --require', () => {
+    const script = path.join(__dirname, '../../fixtures/require-script');
+    mm(process.env, 'NODE_ENV', 'development');
+    return coffee.fork(eggBin, [ 'dev', '--require', script ], { cwd })
+      // .debug()
+      .expect('stdout', /hey, you require me by --require/)
+      .expect('code', 0)
+      .end();
+  });
 });
diff --git a/test/ts.test.js b/test/ts.test.js
new file mode 100644
index 00000000..8d2a3460
--- /dev/null
+++ b/test/ts.test.js
@@ -0,0 +1,34 @@
+'use strict';
+
+const path = require('path');
+const coffee = require('coffee');
+const mm = require('mm');
+
+describe('test/ts.test.js', () => {
+  const eggBin = require.resolve('../bin/egg-bin');
+  const cwd = path.join(__dirname, './fixtures/ts');
+
+  afterEach(mm.restore);
+
+  it('should support ts', () => {
+    mm(process.env, 'NODE_ENV', 'development');
+    return coffee.fork(eggBin, [ 'dev', '--typescript' ], { cwd })
+      .debug()
+      .expect('stdout', /### egg from ts/)
+      .expect('stdout', /options.typescript=true/)
+      .expect('stdout', /egg started/)
+      .expect('code', 0)
+      .end();
+  });
+
+  it('should support ts test', () => {
+    mm(process.env, 'NODE_ENV', 'development');
+    return coffee.fork(eggBin, [ 'test', '--typescript' ], { cwd })
+      .debug()
+      .notExpect('stdout', /false == true/)
+      .notExpect('stdout', /should not load js files/)
+      .expect('stdout', /--- \[string\] 'wrong assert ts'/)
+      .expect('code', 1)
+      .end();
+  });
+});