In order to provide advice for the future installation of the environment control system for the helicopter in Chi.na, in this paper, all kinds of common airborne refrigeration systems and heating systems were summarized. The form of atypical helicopter’s loop control system was counted. It was summarized that the development trend of the environmentcontrol system of helicopter was evaporative cycle refrigeration system combined with engine bleed air heating system. Byanalyzing the performance requirements of the main components of the evaporative cycle refrigeration system, it was sug.gested that the selection of scroll compressor, parallel flow heat exchanger and electronic expansion valve should be givenmore priority in installing an airborne evaporative cycle refrigeration system in the future.