Abstract: A roadside device (15) is provided with a corresponding table in the case where there is an item of a new version of a taste data table to take over from user taste information in an item of an old version of the taste data table. In the corresponding 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 (17) sets user taste data in the item numbers of the old version corresponding to the item numbers of the new version 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 (17) of the transmitting-destination user.