A synthetical vehicles location and navigation system which integrated GPS global positioning system,GSM short information service system and GIS geography information system has been discussed in this paper.This system adopts the GPS/DRS localization way and communication between vehicles and control center is achieved through GSM network.Moreover,it realized the positioning,navigating and monitoring of vehicles using electronic map at the same time.This system has friendly man-machine interface and reliable performance and has certain social economic benefits.