Abstract: The contents of study and development in intelligent transport systems(ITS) in our country is introduced, and then the main ideas of public traffic information management system and its dynamic management are expatiated upon. The study and development of public traffic information management system in ITS can enhance to contact with roads, vehicles, drivers and managers one another, so that managers could know the public traffic situation well. Thus traffic congestion can be effectively solved and road traffic faculties can be improved, and so the public traffic intelligent management can be realized. Therefore the efficiency of road transportation and travelling safety will be enhanced, the public traffic information management system has wider prospect in the future.