Ammonia is an environment-friendly natural refrigerant and has been used in industrial refrigeration for more than a century. This paper discusses the energy-saving and safety technologies of the ammonia refrigeration system and presents an analysis of the factors that primarily affect the energy consumption of the ammonia refrigeration system

including the condensation form

combined cooling and heating

variable frequency technology

and automatic intelligent control. Safety factors are discussed based on low-charge technology

hazard and operability

and the safety of instrumentations. Results show that reasonably applying the above two technologies can effectively improve the safety and energy saving of ammonia refrigeration systems. To promote the safe application and technical development of ammonia refrigeration systems

professional training must be strengthened for personnel responsible for the operation and maintenance of ammonia refrigeration systems.