There are mechanical, electronic or network vehicle anti-theft systems. But in reality its flexibility and the interaction between the drivers and vehicles are poor. In this paper we designed both the hardware structure and software on Android OS to achieve the theft proof function. The stolen car's owner can implement human-car interaction, receive the car image, locate his car automatically and plan the optimal chasing path. The experimental results show that the system has good flexibility, strong interactivity, small size and low cost, which meets the demands of vehicle anti-theft system.