【Abstract】The purpose of this research is to discuss the functions of membership model and how it effect on the companies. And this paper also discuss the membership model offer a method to help the corporation develop its business to achieve the goal of increase sales. Moreover， the membership organization experiences the change within the development of technology. The membership model saves many corporations and help them become strong in the market. Nonetheless， the membership model is not limited use in profitable business， it also applicable for the non-profit organizations， such as charitable corporations.
　　【Key words】Membership； Business Strategy； Sam’s Club； Non-profit Organizations
　　Introduction
　　Membership model as one of the business strategies which utilized widely by many different kinds of institutions， it must have many advantages to help the companies create value and earn the profit. “The membership strategy is an example of institutional strategies that represents a firm-level attempt to manipulate and establish institutions so that a firm may derive advantage” （Brandt