Problem Statement and Purpose. The key issue of the system methodology is the analysis of the degree of complexity and ordering of geosystems, hi this paper, we will define the peculiarities of the ethnic environment, the formation and development of which depends on the peculiarities of the interaction of ethnic communities with the natural and man-made environment.The purpose of the work is to substantiate the theoretical and methodological principles of the formation and development of ethnogeographic environment. According to this goal, the following tasks have been set: to identify the prerequisites and specifics of the formation of ethnogeographic environments and to substantiate the influence of various socio-geographical factors on the ethnographic environment. The object of the study is an ethnographic environment. The subject of the research is the theoretical and methodological features of the formation and development of ethnographic environments.Data Methods. The basis of this article is the regulatory-legal acts in the field of inter-ethnic relations, including their socio-economic development, and theoretical and methodological developments on these issues of geographers, sociologists, culturologists.A key role in achieving the task is given to the systemic method. In this paper we will define the peculiarities of the formation of the ethnogeographic environment as a complex system, the functioning of which is due to the effect of many socio-geographical factors. Some other general scientific methods of socio-geographical research are also applied - analysis and synthesis, induction and deduction, abstraction, formalization.Results. In the context of justifying the concept of EGS. the development of methodological principles, directions and methods for their analysis, it is first necessary to analyze the features of the formation of etlmogeographic environments, within which ethnogeographic systems, differing in terms of quantity and quality. When addressing this issue, it should be borne in mind that the vital activity of etlinonational groups is largely determined by the features of settlement, the specifics of their own development (ethnogenesis) and interaction with groups with which they live in the same territory. The greatest synergetic effect of social development will be achieved by taking into account the diversity of material and spiritual culture of etlinonational groups.The variety of factors that determine the specifics of the formation and development of ethnogeographic environments can be grouped into seven main groups: natural-geographical. geodemographic, socio-geographical. economic-geographical, ethnocultural and managerial, ethnopsychological. The subject area of ethnic geography provides for a comprehensive study of all factors of the sustainable development of etlinonational groups or their individual components within a particular territory. Approaches to solving these problems largely determine the methodological features of ethnogeographic research. It should be noted that all these factors in their impact on specific aspects of the life of groups are interrelated and interdependent. Note that these factors are actually the directions of scientific research in the ethno-national sphere. The proposed concept of EGS envisages an increase in the complexity of research and the use of the system approach.