The article is devoted to one of the topical problems of modern science – the problem of correlating a person with his environment. This problem is considered by the scientific community from different angles, depending on the components of the environment. It is generally accepted that the ecological aspects of the study of this interaction lie in the field of biology, chemistry and physiology, and the social sciences remain outside the subject. Man, as a bio-psycho-social being, cannot but interact with the components of the social environment. The article substantiates the methodology for studying the state of the social environment, aimed at optimizing the socio-ecological interaction in the system “man – social environment”. This approach makes it possible to assess the factors of the social environment in terms of the human dimension. The study of the influence of factors of the social environment on the demographic behavior of a person is important for optimizing the socio-ecological interaction in the “man – social environment” system. The article discusses the conditions for the action of an organized personality in a favorable and unfavorable social environment, the direct and indirect influence of environmental factors on a person’s demographic attitudes. Social and intrapersonal interaction in a human-sized and non-human-sized social environment takes various forms and methods, since it depends on the conditions of the individual’s action, including norms and values in the immediate environment of society as a whole. Factors of the social environment that have both direct and indirect effects on the demographic behavior of a person can be used as criteria for assessing the human dimension of the social environment. In conclusion, it is said about the significance of the results obtained for the development of ways of greening the social environment and its harmonization in relation to a person.