"Beiyou Book Management System" is a modern library information network system independently developed by Beijing Chuangxun Future Software Technology Co., Ltd., which is abbreviated as MELINETS in English. The system has the characteristics of complete user function modules, good interface and flexible setting of function parameters, and has the function of wide area network environment application service, which realizes the application of various international and domestic standards and protocols in database storage layer, application retrieval layer and user interface layer. It can be applied to all kinds of libraries, information centers, document information service institutions and regional or industrial document information resource sharing centers, and has broad application prospects.