The present invention relates to a rainwater storage facility, wherein an opened and closed window is installed on a side surface of the rainwater storage facility, and an inner surface of the window is reflection-processed to enable an ultraviolet light sterilization lamp to be attached to the inner surface to sterilize rainwater inside a storage tank. Moreover, the rainwater storage facility can be easily repaired by opening the window when the rainwater storage facility is required to be replaced and repaired.COPYRIGHT KIPO 2017우수 저장시설 측면에 개폐 가능한 창문을 설치하고, 창문의 안쪽면을 반사처리하여 자외선살균등을 부착하여 저장조 내부의 우수를 살균처리하며, 교체 및 수리가 필요한 경우 창문을 열어 간단히 수리할 수 있는 우수저장시설
