图书管理：增加图书、修改图书、删除图书、统计图书；

借阅管理：查找图书、借阅图书、归还图书、借阅图书统计；

读者管理：申请读者卡、删除读者卡、修改读者卡；

馆员管理：添加管理员、修改管理员信息、删除管理员。

-Library management: increasing Books, modify books, remove the books, statistical books　lending management: Find books, borrow books, returned books, borrow books and Statistics　reader management: application card readers, card readers delete, modify, card readers　Librarian Management: Add administrator to modify the administrator information, delete administrators.