Car crash detection method, apparatus, and system, terminal device, and vehicle-mounted device

A method, applied to a vehicle-mounted device, the method comprising:

• detecting whether a traveling abnormality happens to a vehicle in which the vehicle-mounted device is located, to obtain a detection result;
• receiving second abnormality prompt information sent by a terminal device;
• and
• determining, based on the detection result and the second abnormality prompt information, whether to make a call for emergency rescue, wherein the vehicle-mounted device and the terminal device are in the vehicle, and there is a communication connection between the vehicle-mounted device and the terminal device.

A terminal device, comprising:

• at least one processor;
• and
• memory storing instructions, wherein the at least one processor is configured to read the instructions to cause the terminal device to:
• detect first traveling data of a vehicle;
• receive first abnormality prompt information sent by a vehicle-mounted device;
• and
• determine, based on the first traveling data and the first abnormality prompt information, whether to make a call for emergency rescue, wherein the vehicle-mounted device and the terminal device are in the vehicle, and there is a communication connection between the vehicle-mounted device and the terminal device.