In order to find the roles of knowledge-intensive business services(KIBS) in the innovation activities,This paper focus on three perspectives.First,we find that KIBS possess good prerequisites to function as vehicles in innovation distribution,the sources of innovation and the facilitators of innovation in their client firms.Second,we further discuss KIBS as the knowledge and innovation infrastructure of society in parallel with the research,educational and other public institutions.Third,we present some research policies and agenda to promote the development of KIBS.It is regarded that much remains to be studied both in the use of KIBS and in their own activities,including integrating and networking the knowledge-intensive services into the client companies,the convergence of various services and closer connection with the client companies’ strategy,and the national policies to connect the KIBS to the different sectors. In order to find the roles of knowledge-intensive business services (KIBS) in the innovation activities, This paper focus on three perspectives. First, we find that KIBS possess good prerequisites to function as vehicles in innovation distribution, the sources of innovation and the facilitators of innovation in their client firms. Second, we further discuss KIBS as the knowledge and innovation infrastructure of society in parallel with the research, educational and other public institutions.Third, we present some research policies and agenda to promote the development of KIBS. It is thought that much remains to be studied both in the use of KIBS and in their own activities, including integrating and networking the knowledge-intensive services into the client companies, the convergence of various services and closer connections with the client companies’ strategy, and the national policies to connect the KIBS to the different sectors.