in an apparatus and method for controlling an interface , a user interface may be controlled using information on a hand motion and a gaze of a user without separate tools such as a mouse and a keyboard . that is , the ui control method provides more intuitive , immersive , and united control of the ui . since a region of interest sensing the hand motion of the user is calculated using a ui object that is controlled based on the hand motion within the roi , the user may control the ui object in the same method and feel regardless of a distance from the user to a sensor . in addition , since positions and directions of view points are adjusted based on a position and direction of the gaze , a binocular 2d / 3d image based on motion parallax may be provided .