While a user carrying a mobile terminal is aboard a vehicle, communication is available between on-vehicle equipment and the mobile terminal by near field communication, and therefore, the mobile terminal stands by and only the location information measured by the on-vehicle equipment is transmitted to a server. After the user gets off the vehicle, radio communication between the on-vehicle equipment and the mobile terminal is cut off, and therefore, the mobile terminal starts measuring the location etc. and only the location information measured by the mobile terminal is transmitted to the server. The server accumulates the location information sent from the on-vehicle equipment or the mobile terminal. Then, the server generates an inquiry image in which figures each representing the movement trajectory of the user are combined on a map based on the accumulated location information and transmits the inquiry image to the on-vehicle equipment.