In an information providing system insertion of a card into a navigation apparatus is detected, and information about a facility specifically related to the card is provided. If one of a wireless communication card, a memory card, an ETC card, an HDD card, and a credit card is inserted into a card slot or an ETC card slot, traffic information or facility information related to the inserted card is transmitted from an information center to the navigation apparatus, and the traffic information or the facility information specifically related to the inserted card is provided to a user, in addition to normal route guidance information.