Abstract: This paper summarizes the current status of the knowledge service in US university libraries and makes a detailed analysis of a typical case of US university libraries knowledge service. Through further investigation of the current status of the collection resource service, the digital reference service, the subject service, the personalized service and the mobile knowledge service in ten university libraries in China, the paper shows the difference between knowledge services supplied by Chinese and US university libraries, and discusses the ref- erential value of the successful experience of US university libraries knowledge services to improve the knowledge service of university libraries in China.

Key words: university library; knowledge service; subject service; personalized service