NOVELTY - A water supply and drainage system has a temperature reducing device (1), a rain water storing device (2), a drug spraying device (3), a hyper-filtering water supply device (4) and a sewage treatment system (5).    USE - Water supply and drainage system for livestock and poultry farm.    ADVANTAGE - The system can save water and recycle water resources, and has low manufacturing cost.    DETAILED DESCRIPTION - A water supply and drainage system comprises a temperature reducing device (1), a rain water storing device (2), a drug spraying device (3), a hyper-filtering water supply device (4) and a sewage treatment system (5). In the temperature reducing device, the header pipe is connected to the well and the rain water tank through a first water pump, the branch pipe is connected to a water pipe anchor block and provided with a sprinkler. In the rain water storing device, rain water storing tanks are provided at the caves of cottage of the livestock and poultry farm, the rain water pipe is connected to the rain water valve and a first drain valve. In the drug spraying device, the liquid drug pot is connected to the liquid drug header pipe which is connected to the second drain valve. The drug water branch pipe is provided with a tiny spray head. In the hyper-filtering water supply device, hyper-filtration film water processor is respectively connected to the sewer valve and the drinking water header pipe, and the drinking water branch pipe is connected to a water feeder. In the sewage treatment system, the well and the rain water tank are connected to the second water pump, the washing water control valve is connected to the second water pump, the washing water header pipe is connected to the washing valve, and the bio-chemical pool is connected to the fertilizer pool in the land through a fertilizer water pipe.    DESCRIPTION OF DRAWING(S) - The drawing shows a water supply and drainage system for livestock and poultry farm (Drawing includes non-English language text).    Temperature reducing device (1)    Rain water storing device (2)    Drug spraying device (3)    Hyper-filtrating water supply device (4)    Sewage treatment system (5)