It is well known that more than 99.3% of the dialysis fluid is water, and each patient needs to use 120~150L of water for one dialysis session, which is equivalent to the patient’s blood will be subjected to 15,000~30,000L of water washing in a year. Therefore, the quality of water is very important to the survival rate and quality of survival of the patient. Studies have shown that dialysis fluid that is contaminated with bacteria and endotoxins can leave patients in a long-term microinflammatory state, resulting in impaired immune system, reduced erythropoietin utility, β2 microglobulin amyloidosis, malnutrition, atherosclerosis, and increased incidence of cardiovascular disease, ultimately leading to high mortality. The Pharmaceutical Industry Standard of the People’s Republic of China has the following requirements for the microbiological aspects of water used for hemodialysis and related treatments: 1. The total number of bacteria contained in the treated water shall not exceed 100 CFU/ml; 2. Bacterial endotoxin at the output of the water treatment unit shall not exceed 1 EU/ml; bacterial endotoxin at the delivery point of the inlet of the hemodialysis unit shall not exceed 5 EU/ml. In economically developed Europe, the requirements for dialysis water are even higher and patients commonly use ultrapure water for dialysis (endotoxin ≤ 0.25EU/ml). Since the opening of the Hemodialysis Center, it has been committed to improving the quality and prolonging the survival time of patients. In addition to using the advanced imported secondary reverse osmosis water treatment system, the center has been focusing on the daily maintenance and disinfection of the water treatment system to ensure the good quality of dialysis water.