Modular robot, system for combination of modular robot each other and method for combination thereof

The present invention relates to a modular robot, and a combining system and a method for a modular robot. The modular robot comprises: a light emitting body which leads to a stop position when the other modular robot approaches the driving path or the combination range of one modular robot; an approaching sensor which senses the other modular robot approaching the combination range; and a sensing sensor which senses the brightness value of the light emitting body emitting from the other modular robot in order to determine a driving direction when the modular robot is combined with the other modular robot. The light emitting body, the approaching sensor, and the sensing sensor are formed in at least one sensor module which is radially mounted on the circumference of a body of the modular robot. According to the present invention, modular robots can mutually recognize the position of a modular robot to be combined, using the brightness value of the light emitting body (i.e. RGB-LED), and can also lead to the designated position for combination, thereby accurately performing the combination between modular robots with a simpler composition than the conventional composition.