This assessment device is equipped with: an detection data acquisition unit that acquires imaging data of the bucket of construction machinery; a first display control unit that displays the imaging data on a display screen of a display device; a second display control unit that displays, on the display screen, a shape that indicates at least part of the outline of the bucket when the bucket is viewed from the side, and which moves the shape on the display screen according to the manipulation of an input device; and an identification unit that discriminates, on the basis of the shape aligned with the bucket, between the bucket and the excavated material coming out from the opening edge of the bucket, on the display screen.