This textbook corresponds to the discipline program "Thermodynamics and Statistical Physics", related to the disciplines of the basic part of the professional cycle of the main educational program B1. B26 for bachelors of radiophysics faculty, mandatory for mastering in 6 and 7 semesters . The manual describes the basics of phenomenological and statistical description of the properties of macroscopic systems. In this case, states and processes at sufficiently high temperatures are considered, when the equations of classical mechanics can be used for statistical description. Phenomena occurring at low temperatures, at which it is necessary to take into account the quantum properties of particles, will be considered in the second part of the manual.