Nowadays, there is a key problem in the development of energy conservation and energy efficiency in the Russian Federation. It is the absence of the system for assessing energy efficiency of the largest ultimate customers of the energy resources, they are industrial facilities. We can speak about the existence of the methods for classifying residential buildings or equipment as energy efficient. We can also speak about the absence of the methods for assessing the energy efficiency of the industrial facilities in both foreign and Russian practice nowadays. The methodological basis for the development of the rating system for assessing the energy efficiency of the industrial facilities is discussed in this article. The fundamental principles are presented in it. They must be taken into account when developing the rating system. The structural and logical scheme for the development of the rating system for assessing the energy efficiency of the industrial facilities is proposed. It reflects the relationship and sequence of its main elements, and it allows presenting the development process in the complete form.