Abstract. The main methodological problems of the organization and implementation of the process of financial security management within the functioning of economic systems of different levels are identified. To meet the methodological needs of financial security management under financial security itself, it is proposed to understand the state of protection of financial interests in various sectors and functional areas of financial activities of the economic system and its main participants from external and internal threats, which ensures the effectiveness of economic relations, related to the implementation of financial guidelines for the development of economic, socio-economic, economic systems. It is established that the classical approach to the structure of the financial security subsystem in the system of economic security at any level of management positions it as a set of factors, the state of which determines the financial capacity of the entity or system to counteract economic risks and threats and their negative financial impact on the system respectively. The elements of financial security at the micro and macro levels are systematized according to such parameters as the financial security system, security entities, information principles, personnel component, management mechanism, resources, tools, instruments. A 16-component model of financial security management is proposed, which provides for the possibility of building a management system on four fundamental parameters: organizational culture, progressive and sustainable development, continuous optimization of the management process and ensuring its systemic nature. The proposed formulas for calculating the level of financial security of the state and the level of financial security of the entity based on the author’s approach to segmenting their system for diagnostic purposes allow to obtain a rapid assessment of the financial security of the economic system, of course. Conceptual bases of the system approach to management of financial security of economic system taking into account object of management, subjects of management, the management mechanism, system of maintenance of process of management, principles of management and an estimation of level of safety are presented. Keywords: financial security, financial security management, risk, threat, economic security, economic system. JEL Classification G21, F29, L41. Formulas: 3; fig.: 3; tabl.: 3; bibl.: 10.