Purchase-sale-stock management system and method according to storage life of sold articles

The invention provides a purchase-sale-stock management system with a storage life. The purchase-sale-stock management system comprises an article purchase-sale-stock management system, a bar code reading device and a date reading device. The article purchase-sale-stock management system is provided with a dynamic stock calculation module, and an article is provided with an article bar code and astorage date. The bar code data of the article bar code on the article is read by using the bar code reading device, and the storage date on the article is scanned and read by using the date reading device, so that the bar code data and the storage date can be conveniently stored by the article purchase-sale-stock management system. An article sales (management) device is used for transmitting thestorage date and at least one sales quantity data to the article purchase-sale-stock management system in article sales operation; and stock calculation is conducted on the dynamic stock calculationmodule by using the storage