STEERING CONTROL DEVICE AND METHOD OF VEHICLE

The embodiments may provide a steering control device of a vehicle equipped with a steer-by-wire steering system and a rear wheel steering system. A steering control device may include a sensor configured to acquire information on the vehicle, and a controller configured to, in response to a determination of a failure of the steer-by-wire steering system, determine a target yaw rate according to a target steering angle based on the information acquired from the sensor, and generate and output a differential braking control signal and a rear wheel steering control signal to follow the target yaw rate.