Method identificating type of aircraft by using range-doppler image

The present invention relates to aircraft type identification method using the aircraft identification device, the present invention is the Doppler frequency in the step, the reflected signal that emits electromagnetic waves toward the aircraft by the radar, and receives the signal reflected from the aircraft 0Hz of the first signal and the engine includes the steps of: Doppler frequency to extract the second signal is not 0Hz, step, the aircraft using the second signal to calculate the length of the aircraft using the first signal depending on the number and the engine, calculating a distance between the step and the length of the aircraft, based on the distance between the number of the engine and the engine to navigate the aircraft to match the aircraft from the database and the search result and a step for outputting a type of the aircraft. According to the invention, by using a signal reflected from the aircraft can be calculated a number of features with which the aircraft, and by a plurality of said features is the type of the aircraft can be identified with high accuracy.