The invention discloses a future traffic planning system based on positioning information and path data sharing. The system includes a terminal device, a path request agent server, a positioning system, a central database, a real-time traffic monitoring system, a road network information dynamic calculating system and an information publisher, wherein a trip plan request is sent to the path request agent server through the terminal device, and the position information involved in the trip plan request is read from the positioning system through the path request agent server and is sent to thecentral database in real time; the position information is received, extracted and stored by the central database in real time and the traffic flow data involved in the trip plan request is excavated;the monitoring data of driving vehicles on the road involved in the trip plan request is provided by the real-time traffic monitoring system; the traffic data, at the estimated arrival time, of the road section involved in the travel plan request and the optimal path are calculated by the road network information dynamic calculating system according to the traffic flow data and the monitoring data and are sent to the terminal device through the information publisher, and the present situation of traffic jam can be effectively relieved.