摘要:The library management system runs on the DOS system, based on the C lan-guage as the main programming language and Visual C as the development environment. According to the characteristics of the system, we construct the development model and then build structural analysis, system function modules and system flow chart through the demand analysis of the system. Through the analysis of each function module, the definition and attributes of the data and the realization of each function are determined. In the paper, the design of the library management system includes the user module, the administrator module and the module of tourists and also achieves the usual function including borrowing books, returning books and books management.