The present disclosure relates to an x-ray imaging method using a variable imaging plane projection and to an x-ray imaging device applying the same. By applying a variable imaging plane projection using at least two sets of scan data for different heights obtained while varying the height of the x-ray generator from an imaging object, it is possible to solve problems caused due to a magnification effect generated in the x-ray imaging field based on a fan-beam-type or cone-beam-type x-ray generator, thereby providing more accurate x-ray image information.
