Abstract: The construction and services of lib2.0 need the active participation of many readers and the support of database systems. Mining reader information and database resources can improve the service level of library 2.0. Based on the expounding the meaning of library 2.0 and data mining technology, this paper discusses the construction of library 2.0 by using data mining technology.

Key words: data mining technology; library 2.0; the construction of library