The paper, through descriping the concept of the supply chain oi knowledge, studies the advantages of Web2. 0 and the relationship between them, and on the basis of which studies how the Web2. 0 technology optimizes the knowledge supply chain in library, as to construct the knowledge innovation model based on the Wiki, Blog, the knowledge transfertion model based on Folksonomy, RSS, the knowledge application model based on Ajax, and to achieve the purpose of improveing library core competitiveness and sustainable development of the library.%通过阐述知识供应链的概念，分析Web2．0的优势及二者的关系，并在此基础上研究如何通过Web2．0的各项技术来优化图书馆的知识供应链，构建了基于Wiki与Blog的知识创新、基于Folksonomy与RSS的知识转移、基于Ajax的知识应用三个具体优化模型，旨在提高图书馆服务效率和核心竞争力、促进图书馆可持续发屁
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