Abstract: A customer-use terminal unit 20 managed by a customer transmits exchange instructing information, which instructs an exchange of valuable points obtained by the customer for communication points used for receiving on-line services, to a central unit 10 that manages the communication points (S202). The central unit 10 transmits valuable point request information according to the received exchange instructing information to a cooperate-use terminal unit 30 that manages the valuable points (S204). The cooperate-use terminal unit 30 transmits valuable points corresponding to the received valuable point request information to the central unit 10 (S206). The central unit 10 exchanges the received valuable points for communication points according to a predetermined exchange rate (S209).