RO system is used to desalinize, desalination rate can reach 95%-98%，reclaiming rate can reach 25%-40%, output water is safe and favorable for people. Pollutants including lead, copper, arsenic, mercury, magnesium, zinc, cyanide, sulphide, nickel, silver, manganese, barium, chromium, CHCl₃, CCl₄, benzene, pesticide, hydroxybenzene and bacteria are removed.