An apparatus for detecting an emergency situation of a vehicle comprises a sensor unit, an emergency situation determining unit and a communication unit. The sensor unit constitutes with one or more of a speed sensor, a wheel sensor, an acceleration sensor, a lateral acceleration sensor, a yaw rate sensor, and a tilt sensor. The emergency situation determining unit receives a signal from the sensor unit and determines whether a driver's vehicle is in an emergency situation. The communication unit creates at least one of an emergency situation message representing the emergency situation of the driver's vehicle and a release message representing the release of the emergency situation according to the determination result of the emergency situation determining unit, transmits the message to an external emergency situation propagation device, and allows the emergency situation propagation device to propagate an emergency propagation state of the driver's vehicle to the outside.