The climatotherapy associated with favourable environmental conditions is an important factor for improvement human health. In this paper, we had presented results from selected studies carried out in Srobar´s institute for tuberculosis and respiratory dieseases Dolný Smokovec in the High Tatras. Srobar´s institute was for many years specialised health care institution providing complete in patients and outpatients terapeutical and preventive care for children of 0 - 18 years of age. Cooperation all together with Pediatric clinic St Andrea hospital of Universita La Sapienza in Roma performed in 2002 all together with Rabka Zdroj Institute and Motol hospital Prague,showed interesting results. We had found–out that children suffered respiratory allergy and asthma had lower level of values of MEF25 (middle forced respiratory flow on the level of 25% of peak respiratory flow) at the first day of hospitalization in opposite to the values after one-week treatment. On the other hand, the level of FeNO concentration (forced expired nitrogen monoxide) was significantly lower after one-week treatment. Children ´s without chronic allergy and asthma, values of MEF 25 and FeNO were unchanged.