Notefirst is an online document management and research collaboration system. If it is used properly, it can also be used as one of the supported platforms of the knowledge service for the experts. This paper simply introduces the concept of the knowledge service for the experts, the eurrent situation, the existing problems and the solutions. Based on these, it sets Notefirst V3.0 as an example, introduces the Notefirst practice experience in the applieation of expert knowledge service, analyzes the application signific...