1. A three-dimensional recognition result displaying method for inspecting a recognition-target object of manufacture, wherein three-dimensional information on an edge in an image is obtained through measurement processing, the image is produced by imaging the 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 the recognition-target object, the method comprising: a first step of performing, by one or more computers, 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 one or more images on a display, the display being configured for switching between display of only an edge projection image of the recognition-target object produced by the perspective transformation and display of only a projection image of the three-dimensional model of the recognition-target object on the display, and for switching between display of only the edge projection image and display of a superimposition of the edge projection image and the projection image, wherein the display is further configured for switching between display of the one or more images and display of one or more edge respective projection image of the recognition-target object or projection image of the three-dimensional model of the recognition-target object that are corresponding to the one or more images and produced based on a coordinate system of a second imaging unit performing the imaging of the recognition-target object obtained by re-performing the perspective transformation in the first step.