1. An augmented reality apparatus comprising: a viewing angle determination module which determines a viewing angle of a user; an attitude determination module which determines an attitude of the augmented reality apparatus using distances between the user and the augmented reality apparatus measured by at least two distance sensors; an image input module which captures an image of one or more subjects; a direction control module which controls a direction of the image input module based on the viewing angle of the user and the attitude of the augmented reality apparatus; an image synthesization module which generates a synthesized image by synthesizing the captured image with a digital image; and a display module which displays the synthesized image.