Microprocessor of vehicle carried system through interface is connected to GPS module, mobile communication module and driving actuator. Exchanging information with GPS module, the microprocessor obtains information of position. Exchanging data with mobile communication module, the microprocessor receives command from handset, and sends information to handset. The method through handset communicates to mobile communication module, and further operates microprocessor. The microprocessor obtains information of position from GPS module, and then through mobile communication module sends the information of position to handset. The invention features no need of building dedicated station, and low failure rate.