This robot cleaner has a much stronger wet cleaning performance that its rivals. The wheelless-type rotating wet duster technology ensures that it cleans the floor while it moves, and the water tank mounted on the rear of the product automatically replenishes water to keep the surface of the cleaning cloth wet. The SLAM function recognizes the surrounding ground shape and positions the cleaner to perform in a pattern that the user chooses, finally sending it back to the charging station after cleaning is completed.