The present invention relates to a water supply apparatus for a stall supplying water to domestic animals in the stall, preventing contamination by circulating the water in a water supply barrel, and preventing microbial growth attributable to an increase in water temperature in summer and drinking water freezing in winter. The present invention includes: the water supply barrel (10) where an inflow port (11) is formed in a lower portion and an overflow outlet (12) is formed on one upper end side with its upper portion open for the domestic animals to be capable of drinking the water a water supply tank (20) connected to the overflow outlet (12) by a recovery line (80), temporarily storing the water overflowing from the water supply barrel (10), and connected to a replenishment water line (25) through which replenishment water is supplied from the outside a circulatory water supply pump (30) circulating the water and disposed at a water supply line (70) for connection between the water supply barrel (10) and the water supply tank (20) a filter (40) disposed between the water supply tank (20) and the circulatory water supply pump (30) or at the recovery line (80) connected to the water supply tank and removing foreign matter and pollutants from the supplied water a heating unit (50) disposed between the circulatory water supply pump (30) and the water supply barrel (10) to increase the temperature of the water a cooling unit (60) disposed between the circulatory water supply pump (30) and the water supply barrel (10) to decrease the temperature of the water a temperature sensor (95) disposed at the water supply barrel (10) to detect the temperature of the water in the water supply barrel and a control unit (90) controlling the heating unit (50) and the cooling unit (60) in accordance with the detected water temperature.COPYRIGHT KIPO 2017본 발명은 축사에 사는 가축에게 물을 공급하되, 급수통의 물을 순환시켜 오염을 방지하고 여름철의 수온 상승으로 인한 미생물 번식 및 겨울철의 식수 동결로 방지할 수 있도록 한 축사용 급수장치에 관한 것으로서,하부에 유입구(11)가 형성
