Abstract: When a communication usage fee of a mobile communication terminal exceed a maximum charge, a mobile communication network side is made to manage a connection destination of the mobile communication terminal. When a mobile communication network receives a connection request message sent from a cell phone, it transmits a phone number of the cell phone to a subscriber information server and acquires usage information thereof. When the usage information is determined to be information indicating that the usage fee of cell phone has already arrived at the maximum charge, the mobile communication network sets maximum arrival information in the connection request message and transmits it to a connection management server. When it is determined that the maximum arrival information is set in the connection request message, the connection management server restricts the connection destination of cell phone to predetermined specific connection destination addresses.