Provided is a method of determining a drive lane using a steering wheel model. The method includes a step S100 of preparing a precise digital map having an accuracy capable of differentiating a road lane; a step S200 of estimating a vehicle location on a road using GPS information; a step S300 of checking whether the vehicle location information is normal using a difference between variation in the azimuth angle of the vehicle obtained by using the GPS information and variation in the azimuth angle of the vehicle obtained by using the steering wheel model; and a step S500 of determining and outputting a drive lane occupied by a running vehicle.