Following the Constitution and laws of Ukraine, the country has determined the basic vector of further development of the foreign policy of the state - integration into the Euro-Atlantic collective security system.At present one of the main tasks of the state is to improve the organizational structure of the Armed Forces of Ukraine to the new conditions of integration processes before joining NATO. Adjustment of the existing organizational structure of the Armed Forces will require the application of appropriate scientific approaches.The purpose of the article is to substantiate methodological approaches to determining the organizational structure of the Armed Forces of Ukraine. This must meet, on the one hand, the basic principles and standards of NATO, and on the other hand, the requirements of modern military art, based on an analysis of the experience of warfare in the east.One of the main stages of scientific research is to justify the method of choosing the organizational structure of the Armed Forces of Ukraine. This study uses the method of Analytic Hierarchy Process (AHP).The results of the study show:- the organizational structure of the Armed Forces significantly influences their combat capability, the system of military control and the organization of comprehensive security;- the main criteria for combat effectiveness of the Armed Forces could be:1) terms of deployment of troops (forces) of operational-tactical and operational-strategic levels;2) terms of readiness of the military control system and comprehensive security system;3) state territorial defense readiness and state air defense system reliability;- the most rational organizational structure of the Armed Forces may be a structure that includes:1) joint operational commands as the main governing body of the operational-strategic grouping of troops (forces);2) army corps (or divisions) as structures of operational and tactical level;3) territorial commands as bodies managing the territorial defense system;4) the state's Air Defense System led by the Air Force Command.