Abstract: Based on the municipal level health information exchange platform, Chongqing Maternal and Child Health Information Management System that can exchange maternal and child health information across industries, departments, and institutions is constructed. Through the construction of system content modules, data association, formulation of data standards, development of shared processes, and promotion and application, the application system covering all maternal and child health data statistical institutions in Chongqing is formed, achieving the goal of integrating with the municipal health exchange platform and county level information systems, and tracking, feedback, and early warning of massive data, so as to provide evidence for the construction of cross institution and cross platform information system data sharing.