Electric window cleaning device

An electric window cleaning device, comprising:

• an operating portion including a pedestal, a plurality of magnets and a plurality of balls, wherein the pedestal includes a handle and a bottom surface formed opposite to the handle, the magnets are disposed on the pedestal, the balls partially protrude from the bottom surface of the pedestal and are free to roll along the pedestal;
• and
• a wiping portion including a base, a plurality of magnets, a plurality of balls and a power mechanism, wherein the base includes a bottom surface, the magnets are disposed in the base, the balls partially protrude from the bottom surface of the base and are free to roll along the base, the power mechanism is supported on the base, and includes an output shaft for outputting rotational kinetic energy and a rotary disc rotated by the output shaft, a duster is fixed to an outer surface of the rotary disc;
• wherein the operating portion and the wiping portion are magnetically attracted to each other across a glass of a window by magnetic forces of the magnets and are attracted to an inner surface and an outer surface of the glass, respectively, when the power mechanism is turned on, the output shaft rotates the rotary disc and the duster to clean the outer surface of the glass, as an user moves the operating portion which is attracted to the inner surface of the glass, the wiping portion will move simultaneously along the outer surface of the glass to perform cleaning operation.