Geothermal is the hot water, steam and gases formed by the accumulated heat at various depths of the earth’s crust. So, geothermal energy includes exploitation of these geothermal sources and their energy directly or indirectly. Hot water and gases heated in the depths of the earth’s crust, fault, etc. tend to rise to the surface using the broken lines. Fluids and gases rising towards the surface are usually detected by drilling operations and can then be used for various purposes. Geothermal energy is a renewable, sustainable, inexhaustible, inexpensive, reliable, environmentally friendly, domestic and green primary energy source. Geothermal plants can be diversified according to the temperature and quantity of the fluid obtained. These facilities are mainly for power plants, greenhouses and residential heating. The fluid obtained from the depths of the ground is pressed back by re-injection drillings after use. This ensures that geothermal energy is a long-lasting and renewable energy.