Abstract: This paper introduces the concepts and characteristics of refrigeration system with thermo-jet boosting and energy saving device.According to various connection mode,compared with the traditional simple refrigeration systems on performance coefficient and power consumption through thermodynamic calculation,simulation research,the air-condition system with ejector gets an ideal energy saving effect.The simulation results show that the cooling efficiency of the refrigeration system with boosting energy saving device can get a degree of improving,and the expected power consumption can reduce by 4%～12%.