Chassis device, building robot and use method of building robot

The invention relates to a building robot, and belongs to the technical field of building robots. Comprising a vertical plate, the vertical plate is fixedly connected to the edge of the side, close to an electric suction cup, of the top of the base, the inner side of the vertical plate makes contact with one side of a water receiving hopper, a water leakage opening located above the water receiving hopper is formed in one side of the vertical plate, and a water guide mechanism used in cooperation with the water leakage opening is arranged on the outer side of the vertical plate; the scrubbing mechanism is arranged on one side of the vertical plate in a sliding manner; the invention further discloses a using method. By starting the driving motor and the water pump, the glass curtain wall can be automatically scrubbed at the same time, generated sewage can be guided into the base through the water receiving hopper by means of the water guide plate to be collected, meanwhile, the filter screen frame is driven to