Research of knowledge management on the university library for subject user

University library service is an important guarantee for improving the competitiveness of libraries. This paper aims at the level of subject in university, based on the concept of subject-user-centered library knowledge management, analyzes the idea of knowledge and framework of the university library services. The conclusion is that knowledge management for user can strengthen academic collections, construct subject librarians of high-quality team, share subject knowledge service, establish the concept of personalized service innovation, comply with knowledge management and the library service.