The research aims to conduct a dialectical analysis of the ecological technosphere as an essential element of the sustainable development of contemporary socio-natural complexes. During the research, the authors used the following research methods: an analytical review of scientific literature on sustainable development, the formation of the ecological culture of society, the method and principles of dialectics, the sphere approach, and the theory of global development. The research yielded several after studying the role and importance of forming the ecological technosphere for sustainable development. First, the ecological technosphere is the result of the dialectical development of the “man–nature–technology” system. In the second place, the factors of sustainable development are the stability of its components, such as environmental and technical potential, activities, social institutions, and relations. Third, the emerging system of the ecological technosphere determines the development vector of the entire system of scientific knowledge and culture. The ecological technosphere is becoming one of the main factors of evolutionary globalism.