Abstract: [ Objective ] To realize the traceability of dairy products produced in Hohhot region of Inner Mongolia, to improve the quality of local consuming and exporting dairy products, and to strengthen the scientific management of the quality and safety of dairy products in this region. [ Methods ]Bibliographic study and systematic study approaches were used in this study. The quality and safety traceability system of dairy products in Hohhot region was constructed by using B/S mode, SQL Server 2000 database, SSH framework, and JSP language programming. Based on the encryption algorithm from streamed code to trace code used in the domestically developed dairy product quality and safety traceability system, a simplified 16-bit coding scheme was designed in this study. The ＂one product one code＂ and safety traceability issues were solved by using the technology of data cache, bar code recognition and backtracking code. [Results ] From the perspective of the whole food chain safety, an information management system for the whole process of dairy production and sales was constructed, and the accuracy and sharing of dairy product information was guaranteed by the use of trace code. [ Conclusion ] The correctness of the program is verified by various methods of software testing, which ensures the feasibility of implementation of the system. A quality and safety traceability system of dairy products in Hohhot region of Inner Mongolia is successfully established and it can be applied in the quality and safety traceability of various dairy products in this region.