This paper begins with a section that describes characteristics of knowledge management in libraries, including: human resource management is the core of knowledge management in libraries; the objective of knowledge management in libraries is to promote knowledge innovation; and information technology is a tool for knowledge management in libraries. The second section addresses the content of knowledge management in libraries, including knowledge innovation management, knowledge dissemination management, knowledge application management, and human resources management. The third section discusses technology for realizing knowledge management in libraries, including: (1) the CKO (Chief Knowledge Officer) system; (2) realizing a seamless combination of library business management with knowledge management during the business process reorganization of libraries; and (3) rebuilding the library culture by using the theory of knowledge management. (MES)