A method of operating a mobile robot includes displaying, on a display unit, a photographing menu including a first photographing item for allowing the mobile robot to perform a specific motion for photographing and a second photographing item for allowing the mobile robot to photograph a user, displaying a screen for guiding a motion setting of the mobile robot on the display unit when the first photographing item is selected, performing, by the mobile robot, a corresponding motion based on an input motion setting for a first reference time when the motion setting of the mobile robot is input, and displaying a result screen on the display unit after the first reference time has elapsed.