Amid the leap in procurement tasks in colleges, a large number of electronic documents have been accumulated. The original one-stop procurement management platform has been unable to manage such a great number of documents. In light of current demand for data management, the system function modules are divided according to the business process throughout the actual life cycle of documents. The object model of the system is built based on the idea of model-driven engineering, and class and sequence diagrams are drawn by rational modeling tools to describe the overall architecture and business logic of the system. Besides, the lightweight flask framework is adopted for research and development, and a document-oriented database (MongoDB) is relied on to tackle the problem of the large concurrent and release the pressure on the data server during reading and writing. For future big data analysis, a PyPDF method is proposed to facilitate the extraction of PDF metadata. As a result, information management is ensured for the final filing during electronic document circulation.