开发本系统的目的在于代替手工管理、统计报表等工作，具体要求包括： 数据录入：录入商品信息、供货商信息、名片、入库信息、出库信息、退货信息等信息； 数据修改：修改商品信息、供货商信息、名片、帐号等信息； 统计数据：统计仓库里面的商品的数量，种类，并计算库存总价值； 数据查询：输入查询条件，就会得到查询结果； 数据备份：定期对数据库做备份，以免在数据库遇到意外破坏的时候能够恢复数据库，从而减少破坏造成的损失。 -The purpose of developing this system instead of manual management, statistical reports, etc., specific requirements include: Data Entry: Input product information, supplier information, business cards, storage information, a library information, return information and other information　data changes: changes product information, supplier information, business cards, account numbers and other information　statistics: statistics of goods inside the warehouse number, type, and calculate the total value of stocks　data query: enter a query, get results　data backup: Regular make a backup of the database, in order to avoid damage to the database when an accident can recover the database, thereby reducing the damage caused by the loss.