Internet of Vehicles emergency communication method, device and system

The invention provides an Internet of Vehicles emergency communication method, device and system. The method comprises the following steps: monitoring the communication state of a return link; when the communication of the return link is interrupted, starting an emergency communication mode; carrying out format conversion on the first communication data sent by each Internet of Vehicles terminal and the second communication data sent by the central node according to a preset communication data protocol to generate corresponding first emergency communication data and second emergency communication data; and sending the first emergency communication data to the central node through a preset satellite communication link, and sending the second emergency communication data to each Internet ofVehicles terminal through an Internet of Vehicles communication link. Normal communication between the central node and vehicles in the communication interruption area is guaranteed in a satellite communication mode. Therefor