Presented contribution describes reasons for rising of rusting and incrustation and possibilities of its removing at the technological equipment during use hot geothermal water from the locality Ïurkov. The village Ïurkov is situated in the eastern part of the Košice Basin (15 km from the city of Kosice) that belongs to one of the most significant and most perspective areas with geothermal waters in Slovakia. Geothermal waters in Ïurkov are bound to Triassic dolomites located in the basement of Neogene sediments. The biggest attention is paid to the choice of the most modern methods for treatment with hot geothermal water, either by chemical or by physical processes and further attention is paid to the geothermal energy system and its parts that are subjected to the rusting and incrustation, the important results of physical-chemical measurements, the values of the elements contained in hot geothermal water. The objects of the scientific research works are also protection of geothermal equipment (geothermal pipes) against incrustation, methods – possibilities of its removing, high mineralization of geothermal water and its elimination. Modern technologies and research acknowledge that problems associated with using of geothermal energy are no more unsolvable. Trend and practice confirm that from the mentioned measures for inhibition of the incrust and rust formation on metallic parts, the equipment CALC-TECH CT-19252 N electronic will play an important role in this industry.