In the case of connecting a line for making connection between communication unit 12 mounted in a vehicle-mounted terminal 10 and center communication unit 21 of an information center 20 and acquiring information accumulated in storage unit 23 of the information center 20, control unit 13 of the vehicle-mounted terminal 10 predicts the necessity for connection between the communication unit 12 and the information center 20 and when it is decided that there is a possibility of the connection and there is the necessity, start processing of line connection to the information center is previously started and information can be immediately sent via a line in which the connection is completed at a point in time of actually sending information from the side of the vehicle-mounted terminal 10 to the side of the information center 20.