Vehicle-mounted T-BOX and alarm method and system

The invention provides a vehicle-mounted T-BOX and an alarm method and system. The vehicle-mounted T-BOX comprises a detection module detecting whether a vehicle shakes or not in a vehicle locking state and generating a shake detection signal when detecting that the vehicle shakes, a GPS positioning module connected with the detection module and used for obtaining the real-time position of the vehicle, and a processor connected with the detection module and the GPS positioning module, awakened after receiving the shake detection signal sent by the detection module, judging whether the vehicleis abnormally moved or not after being awakened according to the vehicle real-time position obtained by the GPS positioning module, generating an alarm signal when the vehicle is abnormally moved andsending the alarm signal to a background server. The alarm system comprises the above vehicle-mounted T-BOX, the background server and a mobile terminal which are sequentially connected. A vehicle owner can know the condition