diff --git a/bin/child-thread.js b/bin/child-thread.js
new file mode 100644
index 0000000..40d939b
--- /dev/null
+++ b/bin/child-thread.js
@@ -0,0 +1,45 @@
+/**
+ * Created by nuintun on 2015/12/4.
+ */
+
+'use strict';
+
+var Emulator = require('./emulator');
+
+// thread
+process.on('message', function (project){
+  var stream;
+
+  var emulator = new Emulator({
+    cwd: project.path,
+    command: project.command.value
+  });
+
+  stream = emulator.start();
+
+  stream.stdout.on('data', function (data){
+    process.send({
+      event: 'data',
+      project: project,
+      data: data.toString()
+    });
+  });
+
+  stream.stderr.on('data', function (error){
+    emulator.stop();
+    process.send({
+      event: 'error',
+      project: project,
+      data: error.toString()
+    });
+  });
+
+  stream.on('close', function (signal){
+    emulator.stop();
+    process.send({
+      event: 'close',
+      project: project,
+      data: signal.toString()
+    });
+  });
+});
diff --git a/bin/emulator.js b/bin/emulator.js
index 408c0cd..41c9402 100644
--- a/bin/emulator.js
+++ b/bin/emulator.js
@@ -69,40 +69,4 @@ function normalizeExecArgs(command, options){
   };
 }
 
-// thread
-process.on('message', function (project){
-  var stream;
-
-  var emulator = new Emulator({
-    cwd: project.path,
-    command: project.command.value
-  });
-
-  stream = emulator.start();
-
-  stream.stdout.on('data', function (data){
-    process.send({
-      event: 'data',
-      project: project,
-      data: data.toString()
-    });
-  });
-
-  stream.stderr.on('data', function (error){
-    emulator.stop();
-    process.send({
-      event: 'error',
-      project: project,
-      data: error.toString()
-    });
-  });
-
-  stream.on('close', function (signal){
-    emulator.stop();
-    process.send({
-      event: 'close',
-      project: project,
-      data: signal.toString()
-    });
-  });
-});
+module.exports = Emulator;
diff --git a/bin/thread.js b/bin/thread.js
index c94a600..e32b04f 100644
--- a/bin/thread.js
+++ b/bin/thread.js
@@ -44,7 +44,7 @@ module.exports = {
               env[item.name] = item.value;
             });
 
-            thread = fork(path.join(__dirname, 'emulator'), {
+            thread = fork(path.join(__dirname, 'child-thread'), {
               env: env
             });