The project information management system includes three parts: ① the project management information structure chart, which is the regulation of the external leading information flow of each department in the project management organization structure; ② Project management information coding, including project coding, organization coding of all units and departments involved in engineering construction, investment control and management information coding, schedule control and management information coding, quality control and management information coding, and contract management information coding; (3) Information card and information processing table, that is, the information classification number, information name, information content, provider, providing time, processor, processing time, processing result, receiver and archivist of each piece of information are specified.