Abstract: The subject of this study is the system of state regulation of the ecological and socioeconomic situation. A conceptual model of territorial management in the form of a stratification of government structures on the basis of a social conditions manifold (on the principle of separation of power) is created. The model is implemented in the form of a periodic system (organization of organizations) that commutatively combines all independent institutions of activities. To formalize the model, the concepts of institutional approach and polysystem stratification (fiber bundling) were used. The situation is described by model of sustainable development, which is based on the idea of both, conservation of nature and development of society. The model refers to the paradigm of public administration as a network phenomenon of interaction between management entities. The organization of territorial management must have the quality of functional completeness, i.e. ability to solve any problem with own means. A mathematical model of the process forming the completeness of the implementation of the system function of territorial management is proposed. It is proved that in the organization of territorial management there should not be special institutional bodies responsible only for conservation and rational environmental management. All governing bodies through specialized departments are obliged to fully implement these tasks within their competences.