It is known that in the center of the Earth the temperature is about 5000 0C and in the direction of the earth's crust it decreases. It is also known that the temperature gradient of the Earth is 3 0C every 100 meters in depth and it is constant throughout the planet. Consequently, the temperature of the Earth's crust is the most beneficial source of heat and energy. It accumulates the energy of the sun and is heated by the focal temperature. In Azerbaijan, at a depth of one meter to 50 meters,

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... the temperature is stable and equal to 5-8 ° C. Keywords: geothermal energy, Earth's crust temperature, temperature gradient, thermal waters, steam turbines and heat pumps, 3D model of the field.