This paper provides a literature survey on “Ground Coupled Heat Exchanger Air-Conditioning System”. The study indicates the use of earth as a heat-sink with an aim of controlling global warming and moving towards a greener air- conditioning technology. Measurements show that the ground temperature below a certain depth remains relatively constant (15 °C-20 °C) throughout the year. This is due to the fact that the temperature fluctuations at the surface of the ground are diminished as the depth of the ground increases because of the high thermal inertia of the soil. The difference in temperature between the outside air and the ground can be utilised as a preheating means in winter and pre-cooling in summer by operating a ground coupled heat exchanger.