Abstract: Because of backward technology of supervision and low price of products, the circulation system of Agricultural Products especially its information chain is still imperfect. A traceability service system for products was developed using hybrid encoding method based on electric labels of RFID and NetScreen code or Two-dimensional code. The system oriented to serve several kinds of users and includes sensing layer, data layer and service layer. The encoding methods, security measures and the processes of quality traceability were introduced, and a backtracking algorithm for computing of three layers tracing-code was also studied in the paper. The demonstration of the system shows that the system is valuable in reducing usage cost of labels and saving storage space of server as well. Moreover, the system integrates the functions of business supply chain etc. The system plays an important role in purifying the products market, protecting farmers' benefits as well as establishing a good brand image of the enterprise.