Energy-saving building

The utility model relates to an energy-saving building. The structure comprises a parapet surrounding a roof for a circle, a water collecting cavity is formed in the parapet wall; the upper end of theparapet wall is opened to form a water inlet; the upper end of the parapet wall is rotationally connected with a cover capable of covering the water inlet, the cover is connected with an overturningpower source, a heat insulation water storage layer is arranged on the roof, a water storage cavity is formed in the heat insulation water storage layer, the water collection cavity is communicated with the water storage cavity through a water inlet pipe, and the water storage cavity is connected with a drainage pipe. According to the utility model, the existing structure of the building is modified to enable the building to have water storage and water supply functions, the original structural attractiveness of the building is not influenced, and the energy-saving effect is achieved. 本实用新型涉及一种节能建筑，包括环绕屋面一周的女儿墙，所述女儿墙内设