[Purpose/Significance] The library is currently in a critical period of development for the "15th Five-Year Plan", and the intelligent strategy is one of the key areas of the library's "15th Five-Year Plan". The large-scale modeling technologies represented by DeepSeek, ZhipuAI, ChatGPT, etc. are reshaping the boundaries and forms of knowledge services through the deep integration of new-generation artificial intelligence technologies and knowledge service systems, providing important theoretical and technical support for the development of library intelligence strategies during the 15th Five-Year Plan period. Therefore, exploring how DeepSeek enhances library knowledge services has become one of the most cutting-edge issues worth paying attention to in the library and information science (LIS) field. [Method/Process] On the basis of a brief review of the current state of research on the integration of DeepSeek and library knowledge service theory, this article designs and proposes a theoretical model for DeepSeek to enhance library knowledge services. It explores the innovative model of DeepSeek that empowers library knowledge services from five aspects: knowledge discovery, knowledge acquisition, knowledge analysis, knowledge recombination, and knowledge utilization and thoroughly analyzes the four core dimensions of technology empowerment, business empowerment, user empowerment, and ecological empowerment. It also elaborates on the security issues of large models caused by the open source strategy, the intellectual property risks caused by technological innovation, the knowledge illusion problems caused by data traps and defects, and the information cocoon problems caused by technological applications. This study aims to provide some reference and inspiration for the research of related issues. [Results/Conclusions] The library is currently in a critical period of development for the "15th Five-Year Plan". DeepSeek's inherent technological advantages such as low cost, high performance, and open source ecosystem not only enable the library knowledge service system in multiple dimensions, reshape the boundaries and forms of knowledge services, comprehensively enhance users' knowledge service experience, but also provide stronger impetus for library construction, management, and service in the "15th Five-Year Plan" period. The theoretical model of DeepSeek empowerment of library knowledge services mainly includes four core dimensions: technology empowerment, business empowerment, user empowerment, and ecological empowerment. It has an impact on library service innovation in five aspects: knowledge discovery, knowledge acquisition, knowledge analysis, knowledge recombination, and knowledge utilization. At the same time, it can bring many problems, such as model security, intellectual property risks, knowledge illusions, and information cocoons. From the existing public information, DeepSeek can provide important technical support and core driving force for library knowledge service innovation in the era of artificial intelligence from four aspects: technical algorithms, training cost, open source ecology, and local lightweight deployment. Since the gradual formation of the DeepSeek open source ecosystem, more and more enterprises, communities, research institutions, teams, and developers have actively participated in and built the industry ecosystem, showing a strong magnetic field effect. Libraries should adhere to the principle of "join if you can't win", actively integrate into the DeepSeek open source ecosystem, and build an ecosystem of knowledge service ecosystems with library industry characteristics and disciplinary features.