A roadside device is provided with a corresponding table where an item of a new version of a taste data table assumed user taste information from an item of an old version of the taste data table. Item numbers “52”, “53”, “62” and “63” in the old version of the taste table, for example, are made to correspond to item numbers “52”, “53” and “63” in the new version of the taste table. An ITS vehicle-mounted device sets user taste data in the updated item numbers to default values of the items in the new version for a transmitting-destination user of the taste data table of the new version and transmits the default data to an ITS vehicle-mounted device of the transmitting-destination user. Thereby, a proper default value is set for a version change of the taste data table in the roadside apparatus, reducing user's input trouble.