Nowadays, many families use water purification products to ensure healthy drinking water. Water purification products on the market are divided into pure water machine, ultrafiltration machine, central machine and business machine according to different product functions. Let consumers who have not been exposed to this emerging home appliance product have no choice. The top ten brands of water purifiers, which brand of water purifiers is good, the price of water purifiers, the brand of water purifiers, and the life of water purifier filter elements all affect consumers' judgment. In order to let more families buy suitable water purifier products, the differences between ultrafiltration machine and pure water machine are sorted out.