The 150~300USRT-level low-carbon high-efficiency magnetic bearing centrifugal compressor/chiller uses low Global warming potential GWP 1 refrigerant. The key technologies include high-efficiency compressed fluid components, active magnetic bearings and magnetic controllers, high-speed spindles, high-speed motor and driver etc. The energy-efficiency is 10% higher than the first-level energy efficiency index announced by the Ministry of Economic Affairs(MOEA). Compared with the old equipment, the annual energy saving rate is more than 25% and the carbon emissions are reduced by more than 30%.