Nowadays public management departments rely on effective management tools to optimize the information flow and provide better policy support. Office automation is also an important part of management innovation. This paper discusses the application of electronic document management system in Beihang University. Based on the analysis of its structure, function and work flow, the paper finds that Beihang University has achieved unity of physical flow and information flow, sharing and coordination of resources and information. The university also offers good experience in the field of security and confidentiality system. This paper suggests that the electronic document management system be adopted to optimize the information service and resources deployment, diversified collaboration and sharing of knowledge be encouraged and management innovation in the Internet era be promoted.