Abstract: Chain supermarkets have been developing rapidly due to their powerful and efficient sever (backstage)/POS (front end) of computer network marketing management system.However,almost all the business software of the supermarkets has installed tax-avoidance function or other supplementary designs to uncover the sales revenue to avoid tax.The thesis,by displaying the functions of the software,discusses the methods and measures to reform and improve the management of the business software in large chain supermarkets.

Key words: business software, business system, tax avoidance