Mobile robot and control method therefor

The present invention relates to a mobile robot and a control method therefor, comprises a floor detection unit comprising multiple transmission units, the detectable distances of which are set differently, and one reception unit, detects the state of a floor by using multiple sensors, thereby can detect a long-distance state, which is farther than the general floor state, as well as the general floor state, an obstacle positioned on the floor, and a drop-off, thus can prevent faulty detection of a drop-off due to an obstacle, sets whether or not to continue running and controls the speed of running on the basis of obstacles, thus can also clean an area into which entry has not been possible due to faulty detection, and therefore has the effect of increasing the area being cleaned.