1. A broadcasting signal receiving apparatus comprising: a display device; a tuner unit which selects a broadcasting channel; a signal processing unit which processes a broadcasting signal that is received through the broadcasting channel selected by the tuner unit; and a camera unit which recognizes a 3D motion of an object that is located outside the display device; and a control unit which, when the motion of the object is recognized, determines a change amount that varies according to amount of the object, and performs an operation which corresponds to the 3D motion of the object according to the change amount.