The article is devoted to the problem of choosing the optimal temperature schedule in the heat supply system. RELEVANCE. Currently, numerous variants of temperature schedules are used in heat supply organizations without a feasibility study of their application. There is a problem of the lack of a unified methodology for choosing the optimal temperature schedule for the heat supply system. The correct choice of the temperature schedule determines the energy efficiency and reliability of the heat supply system. PURPOSE. Analysis of existing methods for selecting the most appropriate temperature schedule for the heating network, assessment of their sufficiency to solve the problem of optimizing the heat supply system. METHODS. To solve this problem, the authors conducted a literature review of existing approaches and methods for selecting temperature schedules in various climatic and operational conditions. CONCLUSION. Based on the analysis, it is concluded that it is necessary to develop a unified methodology for choosing the optimal temperature schedule. In order to be able to use it in practice, the developed methodology should take into account the entire range of parameters of the heat supply system and at the same time minimize the complexity of calculations. The factors proposed to be taken into account when developing a methodology for choosing the optimal temperature schedule are given, including specific energy costs, heat losses in networks, reliability of heat supply taking into account temperature deformations, operating and capital costs, as well as tariff consequences for consumers.