Abstract: 【Purpose/significance】Universities are the main body of innovation, and it is of great significance for university libraries to carry out high-quality patent information services to help university scientific research and innovation【. Method/process】Based on the activity theory, this paper constructs the patent information service framework of university library, analyzes the content of six ele⁃ ments: subject, object, tool, community, division of labor and rules, and the specific content of four subsystems: production, communi⁃ cation, sharing and collaboration and their role changes in the process of patent information analysis. The application of the service framework in the process of patent information service is demonstrated by a working example【. Result/conclusion】The practice shows that the patent information service framework from the perspective of activity theory solves the problems of unclear role, unclear rules, poor communication and low service quality in the existing patent information service, gives full play to the advantages of various ele⁃ ments of the community, improves the degree of collaboration of all participants in the patent information work, and improves the ser⁃ vice efficiency and quality.【Innovation/limitation】Based on the activity theory, the patent information service working mode is opti⁃ mized, the communication and negotiation process is realized, the resource sharing is dynamic, the task allocation is rationalized, the service management is standardized, and the service satisfaction is improved. In the future, it will be applied in more patent intelli⁃ gence analysis or services with similar common problems, and continue to optimize the model.