The purpose is to realize centralized storage and distributed management of files, facilitate convenient inquiry and safety control of materials, improve equipment use efficiency and reduce maintenance costs. The system has established a unified online real-time updated document database, which can store various forms of information content, from multimedia information such as sound, graphics and images to highly structured documents, from e-mail to discussion database; It provides a hierarchical document storage mode to realize the life management of documents, including check-in/check-out, version control, full-text retrieval across all management contents, audit trail, document description and so on.