A system for interlocking a vehicle terminal with a portable terminal includes the vehicle terminal configured to correct vehicle data including mileage, self-diagnosis information, and driving information according to an operation. The portable terminal is physically connected with the vehicle terminal and connected with a service server of a control center through wireless communication. The portable terminal is configured to transmit the vehicle data provided from the vehicle terminal to the service server and receive information and a management service provided from the service server. The portable terminal is provided the information and the management service to the vehicle terminal.