1. An image display device comprising: an imaging unit; an apparatus specifying unit that specifies an object apparatus imaged by the imaging unit; a state acquisition unit that acquires an operating state of the apparatus; an image generating unit that generates an image corresponding to the specified apparatus and the acquired operating state; a positioning unit that determines a reference position of the image acquired by the imaging unit; a combining unit that combines the generated image with the image acquired by the imaging unit using the reference position; and a display that displays the combined image.