A technique which enables a navigation system mounted on a vehicle or the like to be connected with an information providing device by utilizing a short range base station.In cases where a recommended route passes through a communication spot, which is an area enabled for communication by the short range base station, the navigation system is connected with the information providing device through the base station, after moving as far as the communication spot, and in cases where the recommended route does not pass through the communication spot, the system is connected with the information providing device through a public network by a communication terminal.