Abstract: The present invention relates a moiré image capturing apparatus and the related method, the apparatus comprising: an optical projection unit arranged in perpendicular to a reference surface with a light source for illuminating light to the reference surface, where an object is positioned, and a projection grating installed on a optic axis between the light source and the reference surface for projecting the light generated by the light source toward the object; and an optical imaging unit arranged in perpendicular to the reference surface with an imaging lens for making an image with the light reflected at the object and a light receiving part installed on the same optic axis as that of imaging lens for receiving the light passing through the imaging lens to turn into a moiré image, so that a reference grating is removed to make the apparatus in a simpler structure and that a step of removing an image of the reference grating except the moire image having information on figure of the object is n