The present invention relates to a method for providing a linkage service of address book data between telematics and a mobile terminal by interworking with a mobile communication network. According to the present invention, an address book data link service providing method of a call transfer service providing system between telematics and a mobile terminal that interworks with a mobile communication network, comprises (a) receiving a call transfer service request information from a telematics device mounted in a vehicle and distinguishing a subscriber of the telematics device; (b) searching a service registration information of the subscriber and checking information about the telematics device and the mobile terminal of the subscriber; and (c) transferring an address book data of the mobile terminal of the subscriber to the telematics device.