The fuel replenishment amount to a vehicle at each time is collected by a support server 10 through a smartphone 20. Then, information corresponding to calculation results such as the fuel remaining amount based on the information collected by the support server 10 is transmitted to a user through the smartphone 20. Thus, even when a terminal for transmitting the fuel replenishment amount to the smartphone 20 is not installed at a fuel supply station, information meaningful to the user in making a driving plan for the vehicle, such as the fuel remaining amount of the vehicle, can be provided to the user through this smartphone 20 at an appropriate timing.