Geo-thermal energy is an important type of energy source, which is now available for commercial use. Geo-thermal energy finds its application in different purposes were low temperature is required. It can be defined as thermal energy stored in the underground deposit of steam, hot water and hot dry rocks. Geo-hermal energy is one of the cleaner forms of energy available in commercial quantities. The use of this alternative energy source, with low atmospheric emissions, has a beneficial effect on environment by displacing more polluting fossil and nuclear fuels. Rapidly growing energy needs around the world will make geothermal energy exceedingly important in several developing countries. In the production of geothermal energy, wells are used to bring hot water or steam to the surface from underground reservoirs the thermal energy carried in the produced fluid can be used for direct heating in residential, agricultural and industrial applications, or the thermal energy of higher temperature systems can be used to produce electricity. Geothermal energy provides an enormous resource for low temperature applications such as heating and cooling buildings, drying agricultural products, and process heating for industry. This seminars topic deals with the latest developments taking place in exploring Geo-thermal source of energy. It also specifies various utilizations and applications of the non-conventional source of Geo-thermal energy.