1. A method of controlling an application using a motion of an image pickup unit, the method comprising: storing gestures corresponding to a command in order to control an application; tracing a motion parameter corresponding to an image that is continuously input; detecting a gesture corresponding to the traced motion parameter from the stored gestures; and outputting a control signal of a command corresponding to the detected gesture, wherein the tracing of the motion parameter corresponding to the image that is continuously input comprises: detecting a characteristic point of the input image; tracking a trace in time and space of the detected characteristic point from the continuously input image; and tracing a motion parameter corresponding to the trace in time and space of the tracked characteristic point.