The invention provides a chassis water storage structure including a main water collection area, a first water storage area, a second water storage area and a drainage area. The main water collectionarea is in communication with the first water storage area, the second water storage zone and the drainage zone; when a chassis is horizontally placed, in the gravity direction, the main water collection area intersects with the drainage zone, the second water storage area and the first water storage area, and the vertical heights of the intersection positions are all larger than the height of thebottom surface of the main water collection area; and the vertical heights of the main water collection area, the drainage zone, the second water storage area and the first water storage area at theintersection positions have height differences. According to the chassis water storage structure, after condensate water on a heat exchanger falls into the main water collecting area, the condensate water enters the drainage area, the second water storage area and the first water storage area along with increase of the water level, and fourth-step water storage is formed.