The systematically organized state strategic planning is the crucial factor of effective public governance. However, main problems of such planning in Ukraine may be noted as absence of the systematic forecasting and long-term strategic planning, undetermined links and mechanisms of coordination between strategic documents, lack of clear and unified standards, procedures and functions' distribution between actors in planning process. Therefore, the aim of this study consists in determination of modernization directions of the state strategic planning in Ukraine by means of the integrated planning system formation. The definition of "state strategic planning" is proposed in this study with using comparative analysis of various approaches and viewpoints concerning strategic management and strategic planning. The proposed definition and problem analysis of current organization structures and procedures of planning in Ukraine assume as a basis of recommended modernization directions to form the System of State Strategic Planning in Ukraine. The appropriate system of strategic planning documents in Ukraine at national, regional and sectoral levels is suggested with using hierarchy analysis across these levels and analysis of the current set of Ukrainian approved documents in proper field. Special attention is given to national level because national strategic directions and goals constitute general framework for strategic documents at other levels. The 10-years Development Strategy of Ukraine is proposed as the main strategic document of national level. The study generalizes methodological principles, and develops institutional mechanism for making and executing mentioned Strategy, proposes the functions' distribution between governmental and other actors involved in this mechanism