The invention provides an intelligent robot for cleaning water waste through pumping and filtering and a control method thereof, which comprises a shell assembly, a power assembly, a garbage collection assembly, a pumping and drainage assembly, a buoyancy regulating assembly and required electronic elements. The robot eliminates the structures of a prior waste-cleaning robot, such as a brush, a suction port and the like. or a crawler structure adopted by a water waste cleaning ship, and adopts a method of pump-suction filtration, the robot is more suitable for the requirements of water waste cleaning and oil pollution treatment, and solves the problems that some waste and oil pollution cannot be absorbed and the treated waste is wound on the crawler. The power assembly is added, and two modes of manual remote control and automatic cruise are developed. The robot can not only move freely in the water body by remote control, but also be similar to a land-sweeping robot to carry out autonomous cruising and garbage collecting on the water surface, the problems of small working area, low efficiency and high requirement on water environment of a prior cleaning robot are solved.