The article is substantiated necessity changes in the conceptual aspects of strategic management and strategic planning of agribusiness entities. Features of strategic management from the standpoint of a system approach as a dynamic set of interconnected management processes, which are implemented by general and specific management entities at the macro- and microlevels through a set of functions, methods, principles, levers, tools and mechanisms of strategic management and strategic planning in order to increase the efficiency of production, management and supply subsystems of the enterprise, the effectiveness of the resource potential of the agrarian enterprise in the long run, and as a consequence, the formation of a system of competitive advantages. It was established that the process approach to strategic management reflects the organizational aspects of the process, and the emphasis is on identifying factors of macro-, meso- and microenvironment, the division of tools and mechanisms into external and internal, and takes into account not only the sequence of stages, but also their inversion, inconsistency, features of connections between separate stages. Taking into account the peculiarities of the resource potential of agrarian enterprises, the peculiarities of its composition (land, material, financial, human, information resources), in addition to the traditional strategic set, it was proposed to pay attention to strategic directions of resource development of agricultural enterprises. The generalization of some scientific results obtained in the process of research of the subject area, allowed to form the basic methodological principles, which are the basis for creating an effective, adaptive and appropriate strategy, and as a result the formation of a strategic plan of the agricultural enterprise. The concept of strategic management and, accordingly, strategic development of agricultural enterprises proposed in this study is a combination of the provisions of system, process and resource approaches. The implementation of this concept will contribute to the balanced use of resources and competitive products, increasing the level of food security.