This paper analyzes the problems of the modern logistics: track and trace of products, and provides an effective solution that combines with RFID and web services to develop a B/S platform of track and trace of logistics . RFID middleware is adopted in the system implementation process. The paper has done a lot of research in some key technologies in the design ,the manufacturer, the third part of logistics and the retailers are the three key roles, they can both use this system to track and trace products in the Internet.