A heat conducting device in a vehicle whereby heat in the body or shell of the vehicle is transferred to the ground includes a control device, a heat transferring device, and a driving device. The heat transferring device is in the vehicle and is connected to the shell of the vehicle when the vehicle is flameout, the driving device is coupled to the control device and the heat transferring device, such that the heat transferring device is extended downwards from the vehicle, until the heat transferring device contacts the ground, thereby heat of the shell of the vehicle is transferred to the ground.