For improve the driving safety and the technology development of inter-vehicle communication, the communication system of supply two vehicles based on GPS, wireless LAN and embedded technology was researched and designed. The system could send/receive driving data information between two vehicles, and display the necessary information on LCD for drivers. In the paper, the process of the system been researched and designed was described. Two applications based on the system were proposed. The system was not only to achieve the desired functionality, but also made foundation for later research. It had great practical value, and very important for technologies research of vehicle safety and intelligent transportation systems.