An image projection device for projecting an image on a projection object includes a detecting unit configured to detect a detection object present within an object space corresponding to the image projected by the image projection device; a recognizing unit configured to recognize an instruction motion of a user based on detection of the detection object by the detecting unit; and an output unit configured to generate an output corresponding to the instruction motion recognized within the object space by the recognizing unit from the instruction motion and the image projected by the image projection device.