Materials of the long-term experiments executed in Yakutia, Zabaykalsky Krai and the Amur region in natural conditions and on archival materials of engineering survey works are analysed and generalized. The objective of experiments - scientific justification of physical prerequisites of application of nonclassical methods of geoelectrics - a georadar-location and induction regarding realization of new resource-saving and nondestructive technology of studying a thermal condition of the frozen bases of buildings and constructions operated on the urbanized territories of cryolithic zone of Russia. For the first time in the history of domestic and foreign geocryology and geophysics of cryolithic zone, the data on the probabilistic law and structure of distribution of errors of temperature calculation on probabilistic-mathematical models - regression equations - establishing the quantitative relations between temperature of frozen soil on the lower bound of a layer of annual heat turns with coefficient of attenuation of electromagnetic waves in this layer are obtained. It is proved that in most cases the average accuracy of a volume geophysical temperature estimation is comparable with an accuracy of a point estimation of temperature by the method of thermometry of wells. It gives the grounds to pass to a stage of introduction of the studied nonclassical methods of geoelectrics into practice of engineering survey works for the purpose of receiving express estimates of temperature of frozen rocks and soil between points of wells and, what is even more important, into future multilevel system of thermal monitoring of the urbanized territories of cryolithic zone for the long-term forecasting and management of cryogenic safety of Russia.