1. A three-dimensional recognition result displaying method wherein three-dimensional information on an edge in an image is obtained through measurement processing with the image produced by imaging a predetermined recognition-target object; and a recognition result is displayed after a position and an attitude of the recognition-target object are recognized by checking the three-dimensional information with a three-dimensional model expressing an outline shape of a whole of the recognition-target object, the method comprising: a first step of performing perspective transformation of three-dimensional information on the edge obtained through the measurement processing and three-dimensional model to which coordinate transformation is performed based on the recognized position and the attitude of the recognition-target object into a coordinate system of an imaging unit that performs the imaging; and a second step of displaying an edge projection image of the recognition-target object produced by the perspective transformation and a projection image of the three-dimensional model such that the edge projection image and the projection image can be checked with each other.