Abstract: Library service model is the experience formed in the process of libraries’service to their users, which reflects the comprehensive result of interaction between libraries and social subjects during the development of times and technology evolution. It is of great significance to discuss the research hotspot and evolution trend of library service model. Based on the related papers of library service model since the new century,the content analysis method is employed, with co-word analysis as the basic data processing framework, to reveal and interpret the evolution course and content structure of the library service model research since 2000 in China.It is found that the research topic not only represents the continuity and phased characteristics,but also the content system and technical method are gradually enriched and becoming more perfect.

Key words: library service model；service model evolution trend；co-word analysis；content analysis