Reverse Osmosis System is also called RO, which is a reverse migration movement of osmosis. It is a separation method that separates the solute and solvent in the solution by means of the selective interception of the semipermeable membrane under the pressure higher than the osmotic pressure as the driving force, the process of separating water molecules from solutes from a water body. Osmosis refers to the natural permeation of a solvent (ie, water) through a semipermeable membrane into a solution or from a dilute solution to a relatively concentrated solution. However, adding an appropriate pressure to the concentrated solution can stop the permeation, and the pressure at this time is called the osmotic pressure of the solution. If a higher pressure than the natural osmotic pressure is applied to one side of the concentrated solution, the natural osmotic direction is reversed, and the solvent (water) in the concentrated solution is pressed into the dilute solution on the other side of the semipermeable membrane, which is contrary to the normal osmotic process in nature. , it is called reverse osmosis at this time.