PURPOSE : A system for supplying reverse points by a security corporation and a method thereof are provided to enable a service subscriber to receive a benefit of service points maximally according as the subscriber joins to a security commodity and enable an affiliated security corporation to induce a security commodity joining by increasing service points collected with respect to an affiliated security commodity joining of the service subscriber through an investment and returning the service points to the service subscriber as reverse points.CONSTITUTION : A service supplying device(10) for controlling a service generally is connected to a security corporation(20) through a predetermined communication network such as the Internet. The security corporation(20) is connected to a plurality of service subscribers. The service subscriber connects to the security corporation(20) and the service supplying device(10) through a subscriber terminal such as a personal computer. The security corporation(20) supplies a predetermined service point for the corresponding service subscriber according as the service subscriber joins to a security commodity joining. The security corporation(20) transmits service point to the service supplying device(10) and pays a point amount of money corresponded to the service points in a transaction bankbook of the service supplying device(10). The service supplying device(10) performs an investment such as an investment in stocks, an investment for an inauguration of an enterprise, a real estate, etc. using the point amount of money deposited in the bankbook from the security corporation(20), and calculates reverse points corresponded to the investment earnings thereof according to service subscribers. The service supplying device(10) is cooperated with a predetermined investment company(30) which executes an investment process using the point amount of money.? KIPO 2003