An image display system including a display device having a display screen for displaying an image, a touch panel on the display screen, and a goggle apparatus to which the display device is attachable; wherein the image display system is configured to provide a function of displaying a stereoscopic image when the display screen is attached to the goggle apparatus, the image display system comprises: mode setting means (81, S204) for setting the display device to a first display mode or a second display mode different from the first display mode; and first display control means (81, S213-S218) for, in the first display mode, displaying on the display screen a first image including a content image that is a non-stereoscopic image,IMS, and a first user interface image, IMUb, configured to receive a touch operation, in a state where the display device is not attached to the goggle apparatus, and the first user interface image displayed on the display screen enables an operation instruction corresponding to a touch operation on the touch panel; the image display system is characterized in that the image display system comprises: second display control means (81, S205-S212) for, in the second display mode, displaying on the display screen a second image including a content image composed of a left-eye image, IML, and a right-eye image, IMR, having parallax with each other, and a second user interface image,IMUa, configured to receive a touch operation corresponding to the touch operation which can be received by the first user interface image, and the second user interface image displayed on the display screen enables an operation instruction corresponding to a touch operation on the touch panel in a state where the display device is attached to the goggle apparatus; wherein in the second display mode, the second display control means displays the second user interface image at a position different from a position on the display screen where the first user interface image is displayed in the first display mode, in the second display mode, the second display control means displays the left-eye image in a first area of the display screen, the right-eye image is displayed in a second area of the display screen that is different from the first area, and the second user interface image is displayed in a third area of the display screen that is different from the first area and the second area, and the goggle apparatus includes an opening portion for, when the display device is attached to the goggle apparatus, exposing the third area that is a part of the display screen at least to outside the goggle apparatus. mode setting means (81, S204) for setting the display device to a first display mode or a second display mode different from the first display mode; and first display control means (81, S213-S218) for, in the first display mode, displaying on the display screen a first image including a content image that is a non-stereoscopic image,IMS, and a first user interface image, IMUb, configured to receive a touch operation, in a state where the display device is not attached to the goggle apparatus, and the first user interface image displayed on the display screen enables an operation instruction corresponding to a touch operation on the touch panel; second display control means (81, S205-S212) for, in the second display mode, displaying on the display screen a second image including a content image composed of a left-eye image, IML, and a right-eye image, IMR, having parallax with each other, and a second user interface image,IMUa, configured to receive a touch operation corresponding to the touch operation which can be received by the first user interface image, and the second user interface image displayed on the display screen enables an operation instruction corresponding to a touch operation on the touch panel in a state where the display device is attached to the goggle apparatus; wherein in the second display mode, the second display control means displays the second user interface image at a position different from a position on the display screen where the first user interface image is displayed in the first display mode, in the second display mode, the second display control means displays the left-eye image in a first area of the display screen, the right-eye image is displayed in a second area of the display screen that is different from the first area, and the second user interface image is displayed in a third area of the display screen that is different from the first area and the second area, and the goggle apparatus includes an opening portion for, when the display device is attached to the goggle apparatus, exposing the third area that is a part of the display screen at least to outside the goggle apparatus.