The article is interesting for specialists in the economic sphere engaged in researching problems of economic and military-economic potential. The purpose of the article is an analysis of existing approaches to evaluating the military-economic potential of the state, the national power and power of the state. The scientific task was settled by analyzing existing approaches to research and evaluation of military-economic potential, state power and national power, which are the result of research of the world scientific community and used by governments of foreign states. In the course of achieving the purpose of the study, the following methods of scientific knowledge are used: analysis, synthesis, induction, deduction, system approach. During the research conducted: an analysis of existing approaches to research and evaluation of military-economic potential, state power and national power; the disadvantages and advantages of existing approaches are revealed; the proposals for improving existing approaches and possible ways to develop further research in this direction are formed.