In this research, we build a music synchronous application for an Android system. When a group of people get together and want to listen to the same music without external speakers or other audio equipment, the proposed system can connect all the people’s smart phones into a “surrounded giant speakers”. If we adequately put the Android devices in different places, we may also create a surrounded sound effect. The system uses the websocket to synchronize the messages between devices, and supports not only for music synchronization, but also the lyrics synchronization between devices. We hope that such a system can help people to share and enjoy the fun of music.