Provided are wearable glasses including a display and a method of operating the same. The wearable glasses include: a display configured to display an image; a sensor configured to acquire wear state information representing a state in which a user currently wears the wearable glasses, while the image is being displayed on the display; and a processor configured to determine an inclination of the wearable glasses with respect to the user based on the acquired wear state information, and to adjust, based on the determined inclination, the image that is displayed on the display.