Anthropocentrism of modern geo-ecological studies leads to the implementation of environmental assessment. It is an integral assessment of natural-resource potential of natural and anthropogenically-altered geosystems aimed at identifying of their ability to perform the functions without violation of processes of reproduction of the environment and resources. Anthropocentrism of modern geo-ecological studies leads to the implementation of environmental assessment. It is an integral assessment of natural-resource potential of natural and anthropogenically-altered geosystems aimed at identifying of their ability to perform the functions without violation of processes of reproduction of the environment and resources. Development of assessment methods of a state and stability of complex systems today is usually based on an indicator approach and indexes of their state, stability, well-being (health), as well as on classification models based on the grade or grade-index approach. All grades are subdivided on singl