An adequate display operation control in accordance with the external world situation is realized. For example, where a user wears the wearing unit of a spectacle-shaped or head-worn unit, the user is made to be able to view any type of image on the display section immediately in front of the eyes, and provided with taken images, reproduced images, and received images. At the point, a control relative to various display operations such as on/off of the display operation, display operation mode, and source change is carried out based on external world information.