Abstract: To practice the concept of green hosting the 2022 Beijing Winter Olympic Games and reduce the energy consumption and carbon emissions of venues, it is necessary to study the energy-saving characteristics of the refrigeration system of bobsleigh/skeleton track. In this paper, the energy-saving operation of the direct evaporative ammonia refrigeration system was studied by combining theoretical analysis with experiments. First, the load calculation model of bobsleigh/skeleton track in Beijing Winter Olympic Games was established, and the accuracy of the load calculation model was verified by experiments. Second, combined with the meteorological conditions of the national bobsleigh/skeleton center, the characteristics and variation law of the annual maintenance load of the track were analyzed. Finally, the annual operation law and energy saving method of the system were analyzed and calculated. Results show that the average refrigerating load of the track in spring, summer, autumn, and winter is 233.2, 481.4, 211.3, and 64.4 W/m², respectively. The total refrigerating capacity of the refrigeration system whole year is 5.50×10⁴ GJ, and the total power consumption under the design condition is 4 786.08 MW ·h. On the basis that the ice layer meets the requirements of the competition, the annual power consumption of the compressor will be reduced by 176.61 MW ·h and the energy saving of the refrigeration system will be 3.6% when the ice surface temperature is increased by 1 ℃. When the ice dressing work is carried out at night, the cooling power is reduced by 38.8% compared with that in the daytime. When the initial freezing condition is adjusted from September to October, the refrigerating power is reduced by 37.8%. Therefore, adopting seasonal operation mode, increasing ice surface temperature, and selecting appropriate freezing and ice dressing work time can reduce the cooling capacity of the refrigeration system and accomplish energy saving of the system operation. The research results provide a theoretical basis for the energy-saving design and optimal operation of the ice making system of bobsleigh/skeleton track.