Abstract: Based on the latest research on eco-environmental situation and analysis of the characteristics of eco-environmental situation in China with the principle of choosing index, a set of indices on the eco-environmental situations in China has been brought out. And the mathematical models for each index has been created. With the powerful systematic analytical tool, GIS, and data base management system, this thesis classifies each index, calculates their weight by county-level unit, and colligate them into a holistic map of the eco-environmental situations in China. Analysis from the map indicates that the serious eco-environmental situation is mainly distributed on the strap of geophysical transition and the lands used by unstable human activities-especially those places that farms and range lands inter-located or crossing lands between different administration units which show obvious characteristic of interface and undulation. The greatest critically ecological situation belt is situated on the second terrain between the eastern lower lands and the western higher plateau, which occupies from the northeast to the southwest. To the eastern and the southern areas of the belt, ecological situation is obviously better, especially those along the coastal zones. It will provide references to the policy makers and benefit regionally environmental exploration and utilization in the near future.