With the advancement of the EAST project, more and more documents are produced. In order to effectively manage huge amounts of documents, share documents, and promote the collaboration with other organizations, we need to design an integrated document management system, which has a powerful document management function, a strong user management function and a blameless permission control function. Using PHP and MySQL to design control and data structure, the function of document create, edit, delete, search, upload and download is accomplished. The Lightweight Directory Access Protocol technology is used to manage users and achieve access control. By using the Role Based Access Control method, the advanced user permission distribution is achieved. Combining with user and role information, document version control and workflow management are also implemented. Finally this system meets the demand of EAST document management.