Disclosed is a camera system, the camera system including a first camera photographing an object image, a second camera including an actuator moving a lens for focusing, a 3-D depth extraction unit extracting a 3-D depth using object images photographed by the first and second cameras, a memory unit stored with position information of a lens corresponding to a 3-D depth data of an object image, and a controller driving the actuator by reading the position information of the lens corresponding to the 3-D depth of the object image stored in the memory unit based on 3-D depth data extracted by the 3-D depth extraction unit.