A display device having a display screen and a goggle apparatus to which the display device is attachable are included. In a first display mode, a first image including a content image that is a non-stereoscopic image, and a first user interface image is displayed on a display screen, and in a second display mode, a second image including a content image composed of a left-eye image and a right-eye image having parallax with each other, and a second user interface image corresponding to the first user interface image is displayed on the display screen. Then, in the second display mode, the second user interface image is displayed at a position different from a position on the display screen where the first user interface image is displayed in the first display mode.