A touch screen device and an operating method thereof are provided. More specifically, a touch screen device is provided which allows a user to selectively restrict input through a touch screen. The touch screen device includes a screen that includes a display configured to display images thereon and a detector configured to detect a touch on the display and convert the touch into an electrical signal, and a controller configured to cause images to be displayed on the display and receive and process signals from the detector. Further, a user may determine whether the controller is operated according to the signal input into the detector. The determination may be made either by a switch separately installed on an earphone or by inputting a signal into the detector by a user.