System for checking performance of car and method thereof

The present invention relates to a diagnostic system and method for vehicle performance of the application of the satellite telemetry. The invention collects the telemetry data to be real-time transmission for the status information of each engine and parts of the vehicle, compares it with its own specified value for each engine and parts and to diagnose abnormalities of vehicle performance, the diagnostic result for this through the diagnosis device, and the external user and the communication network to request the diagnostic result of the vehicle diagnostic system to monitor the performance of a communication apparatus for real-time communication. Accordingly, the present invention may be the driver or an external user easily detect the abnormal state of the vehicle performance, and can cope with advance and easily than the troubleshooting can pinpoint the affected parts of the vehicle performance for the vehicle breakdown, and, and can you specify the performance of the vehicle that you want the driver or external users know and give them the performance of the vehicle that corresponds with the choice of telemetry data from the car to improve the reliability of vehicle performance, assessment of vehicle performance through network and to provide information for users who need a diagnostic status, and gives the effect that can be provided by providing additional information or other service information of the vehicle.