| In recent years, the Internet services with Web2.0 characteristic were quickly favored by the general public, Web2.0 have infiltrated to a growing number of industries and affected all types of people, a new global round of Internet innovation and entrepreneurship boom were formed, and the upgrading of the Internet have made some encouraging signs of clues. The libraries in domestic and foreign perceived keenly this development trend, sought positively the library transformation and innovation, has carried on some exploration to the library2.0 in theories and practice.One of the library core services—the digital reference service (DRS) are closely related with the development of the Internet, also has been extensive research and practice in libraries at home and abroad. However, under the current environment of Web2.0, the research and practice of DRS is still in the initial stage and partial. Against this background, the paper is intended to make a system, in-depth discussions of the DRS change and innovation in Web2.0 environment; provide the reference to the research and practice of library information services in the network environment; conversely, make certain role to the development of Web2.0.The master framework of DRS innovation was constructed, Then a few key areas of DRS innovation was explored:Under specific circumstances, using the literature review and Bibliometric analysis methods, the research and practice of Web2.0, Library 2.0 and DRS at home and abroad was sum up. The cause of DRS innovation under Web2.0 environment was analysised from the power and the reasons. The theoretical basis of DRS innovation under Web2.0 environment was discussed mainly from the development synergies of Web2.0 and library information service, the line of the theoretical basis, the adaptability of the certain theory, the relevance of the functions. The innovative strategies were analysised from the principle of DRS innovation, the methods of innovation, the patterns and ways of innovation. Two aspects of the specific implementation of the DRS innovation were stated: the innovation of DRS model was discussed; In addition, the inquiry platform of the search engine and its enlightenments to DRS was analyzed. |