With the development of Internet of things technology, Android mobile phone with its unique openness advantage makes our life become more quick and convenient. In this paper the design of smart car was completed on the mobile phone platform with the help of bluetooth technology, which provided a new idea of wireless remote control smart car for us. The function of the smart car was first introduced, and then the hardware and software design of the system were elaborated. The mobile phone bluetooth and bluetooth module HC06 of the singlechip were respectively used as the client and the server. The client implemented JAVA programming processing in App Inventor, while the server was written in C language program for MCU control in order to carry on serial communication. The final results showed that: the car could receive signals from mobile phone and could flexibly implement the realtime control function of forward,backward, turning left, turning right, and stop.