The principle of the radiator tank is that the water is pumped out of the tank by the water pump, flows into the tank through the water pipe, then comes out at the other port of the tank and flows back to the tank through the water pipe, so that the heat on the CPU surface is continuously circulated. The water cooling system includes heat exchanger, circulation system, water tank, water pump and water, and a heat dissipation structure can be added as required. The heat exchanger is the core of the whole water cooling system, and the quality of the water cooling system is completely determined by it, which is also the most ingenious part of the whole system. The circulating system sends water into and out of the heat exchanger respectively, and the other end of the water inlet pipe is connected with the water pump. The water pump is placed in a water storage bucket or other water tanks, and the hot water sent by the water outlet pipe is discharged into the water tank again. If necessary, the hot water in the outlet pipe will be cooled to room temperature by the cooling system, and then discharged back to the water tank. The cooling effect of water cooling is better than that of air cooling system, and the cooling effect of water cooling is at least 10 degree lower than that of good fan. Because there is no fan, the water cooling system will not produce vibration, so it is very quiet.