从知识服务的概念、知识服务与相关概念辨析入手,通过分析纽约公共图书馆、哈佛大学图书馆、上海图书馆和武汉大学图书馆的知识服务案例,归纳出三种知识服务模式:聚合性知识服务模式、决策支持型知识服务模式和问答式知识服务模式,并比较各个模式的优缺点,最后探讨图书馆开展知识服务的必要性、发展前景和注意事项。 Starting from analyzing the concept of knowledge service, knowledge service and related concepts, this paper summarizes three knowledge service models by analyzing the knowledge service cases of New York Public Library, Harvard University Library, Shanghai Library and Wuhan University Library: Service model, decision-support-based knowledge service model and question-answer knowledge service model, and compare the advantages and disadvantages of each model. Finally, the necessity, development prospect and precautions of the library to carry out knowledge service are discussed.