A shutter driving system and a camera device having the same, and a driving method thereof are provided. The shutter driving system includes a base plate including an opening part, a front-curtain and a rear-curtain, a front-curtain link and a rear-curtain link supporting respective folding and unfolding operations of the front-curtain and the rear-curtain, a front-curtain drive lever and a rear-curtain drive lever controlling respective drives of the front-curtain link and the rear-curtain link for opening and closing the opening part, a front-curtain electromagnet and a rear-curtain electromagnet selectively and respectively stopping the front-curtain and rear-curtain drive levers, a cam gear mechanically closing the opening part of the front curtain and mechanically opening the opening part of the rear-curtain, a motor rotating the cam gear, and a reduction gear train including at least one gear disposed between the cam gear and the motor.