Database Management System (DBMS) is the major tool for computer system design nowadays. For a library, bibliographical database is the core file to support all related operations, if the integrated design of bibliographical database isadopted for a library, then the redundency, incompleteness,inconsistency of the library records can be avoided. In this paper, we first introduce the definition, the development, the functions, and the structures of the DBMS, inwhich the hierachical model, network model, relational modelof DBMS is illustrated with the library Files. Then, we explainhow the ideas of DBMS is used to design integrated bibliographical database.