Water purification system is raw water after fine granular activated carbon filter, activated carbon filter filter, compression, again through the pump pressure can use aperture for 1/10,000 mu m (equivalent to escherichia coli size 1/6000, virus 1/3) reverse osmosis membrane (RO film), the relatively high concentrations of water into water, and will be low concentration of industrial pollutants, heavy metal, bacteria, viruses such as large intermingled with water impurities all segregation, achieve drinking provisions physiochemical index and hygiene standards, output to qing dynasty to pure water, it is human body moisture of seasonable compensatory quality of best choice. Because RO reverse osmosis technology production water is dramatically is currently humans master all the water making technology, cleanliness the tallest of almost 100%, so people say the water production machines for reverse osmosis pure water.