This project explores the potential of interaction between the user and wearable computing device especially smartwatch. As we all know, smartwatch is still kind of a prototype device now, but with the sensors, microphone, speaker, vibration motor, camera and Bluetooth inside, it can be developed as a very powerful interactive device in people’s life. This project followed the principle of HCI (Human Computer Interaction) and UCD (User Center Design) philosophies. Besides, as a watch, which is wearing on the wrist of user, so ergonomic research will be included in the project. For the technology part, Java, Android, HTML5, 3D game design and AR (Augmented Reality) will be involved in this project.