The utility model provides a public traffic management system, including automobile -mounted terminal, communication terminal and dispatching management terminal, automobile -mounted terminal has orientation module, the data output module, data receiver module and data management treater, orientation module is used for receiving the GPS signal, advance line location to self, the data output module is used for sending the state information of locating information and vehicle to the dispatching management terminal through communication terminal, data receiver module is used for receiving the order of sending to automobile -mounted terminal at the dispatching management terminal and transmits to the data management treater, data management treater control automobile -mounted terminal reports the position according to appointed time interval and number of times. The system provided by the utility model all -weather satellite positioning function has, and can accurate position, functioning speed, traffic direction and the time information of judging the vehicle to can carry out real -time intelligent scheduling to it, realize the intelligent scheduling management of bus. This will greatly improve urban traffic conveying efficiency, guarantee traffic safety.