The invention discloses and provides a library management system which comprises a landing interface, a function selecting module, a book borrowing module, a book returning module, library management, book classification management, a book query module, a user management module, data backups, data recovery, system initialization and a log-out module. According to the technical scheme, the library management system has the advantages that usage and operation are intuitive and easy, network management is easy and convenient, retrieve and query are clear at a glance, reading contents are various, permission setting is perfect and rich, personal environment is simple and friendly, and information expansion is easy.