To provide the point returning service providing device which updates accumulated points in real time and enables a customer to easily have return according to the points.

When the customer purchases an article, a POS terminal inquires the accumulated points that the customer has of a host computer. According to the accumulated points, the customer can have a return by the points immediately on the spot. Further, the points given as a result of the article purchase are transmitted as data to the host computer in real time to update the accumulated points, so the customer can have a return by the points immediately when purchasing an article next time. On a store side, it is not necessary to specially providing a point returning means such as direct mail, etc., and the operation can be made efficient.