1. A system for motion control of a robot, comprising: a remote controller for recognizing three-dimensional image information, which includes two-dimensional information and distance information of a user, determining a first reference point and a second reference point from the three-dimensional image information, calculating a variation in an angle of a joint in accordance with three-dimensional coordinates of the first reference point and the second reference point, and transmitting a joint control signal corresponding to the variation in the angle of the joint through a wired/wireless network; and a robot for checking joint control data from the joint control signal received from the remote controller and varying the angle of the joint to move according to the user's motion.