Car fault diagnosis remote alarming system and method

The invention discloses car fault diagnosis remote alarming system and method. The car fault diagnosis remote alarming system comprises a vehicle-mounted fault diagnosis alarming device and a far end server; the vehicle-mounted fault diagnosis alarming device comprises a processor module, a CAN (Controller Area Network) bus communication module, a voltage comparison module, a wireless communication module and a display module; the processor module acquires fault signals in a switching-value mode, output by vehicle equipment, by the voltage comparison module, receives equipment fault signals on a CAN bus by the CAN bus communication module and controls the wireless communication module to communicate with the server wirelessly; and the display module is controlled by the processor module and displays the fault signals. The invention uses the vehicle-mounted fault diagnosis alarming device to acquire the fault information of all devices on a car, carries out real-time diagnosis and displays the fault signals when faults occur; and meanwhile, the invention transmits the fault signals to the far-end sever in the mode of wireless communication for storage so as to give an alarm to the server end and inform administrators at the server end to carry out processing in time.