In order to save limited water resources, reduce consumption or water costs, and ease the pollution of water resources caused by increasingly strained sewage discharge, the sewage or wastewater discharged from daily life communities or industrial production after use should undergo appropriate traditional sewage or wastewater treatment, and The clean water discharged up to the standard can be recycled into non-drinkable miscellaneous water supply systems through advanced treatment, such as spraying green spaces, flushing toilets, washing cars, or reusing cooling water.