For thermal problem existed in high power LED, a new heat exchanger based on double inlets and double outlets water jet was proposed. The different cooling effects between the radiator proposed and the current jet cooling radiator were discussed, an experimental platform of high power LED cooling system base on water jet was designed. Under the condition of full power output of the cooling system, the LED substrate′s temperature is distributed and remained at 32℃ in experiment, which shows that the cooling system has excellent abilities in uniforming temperature and distributing heat which the LED produced. And the experiment proves that the system meets the thermal requirements of the high power LED. The effect weights of the pump and the fan were obtained and the consumption power of the cooling system was optimized by using extremum difference analysis. Besides, a set of optimum pulse width modulation signals controlling pumps and fans were obtained through the experiments and analysis. The power consumption of the cooling system was reduced and the energy was saved with these signals.