Electricity distribution - the basic activity of the distribution system operator is traditionally the activity of planning, construction and operation of network operation based on long-term and short-term plans. Financial investments in these plans came primarily from technical planning criteria, but market changes, environmental requirements, as well as a number of technological changes (intensive construction of distributed sources, introduction of advanced networks, growth of electric vehicles market and development of supporting infrastructure) significantly affects access to planning. In order for the distribution system operator to ensure the development and construction of a distribution network that will meet all required requirements, it is necessary to significantly expand the existing technical planning criteria and subject all planned financial investments to economic evaluations using appropriate methods. The paper proposes a model of the asset management system of the distribution system aimed at achieving the set strategic business goals of the distribution system operator. Based on the basic data, from which the input data is general and publicly available, and estimated data, which is calculated, an economic evaluation of the total financial investments of distribution system operators and individual investment facilities were made. The basic challenge of the thesis is to monetize the realized value, and the possible ways of calculating the compensation of the realized value in order to increase consumption, in order to improve the quality of electricity and in order to reduce losses of network elements. Investment and maintenance were viewed as an expense while the stated value was added together. Based on data this thesis performed an economic evaluation of the distribution system operator, one representative distribution area, and an individual investment project. This paper enables the introduction of economic methods for assessing investments in the daily work of distribution system operators, which can significantly increase the overall efficiency of distribution system operators and justify planned investments before the regulatory agency.