The purpose of this study is to find a stream evaluation method considering stream environment. It is easy and quick to quantify and improve evaluation methods to evaluate natural type rivers. In the Gwangju stream natural ecosystem evaluation method, all items were analyzed by applying the existing evaluation part, evaluation items and evaluation criteria. The weighted values calculated using the AHP technique were applied to the evaluation items. As a result of the analysis of the whole items, 74 points were found in the first and second points in the upper stream. And the upper three points were 83 points. And 83 points for the first and fifth branches in the middle class. 81 points in the middle stream, 80 points in the middle stream and 82 points in the middle stream. 72 points in the downstream 1 point, 75 points in the downstream 2 points, and 83 points in the downstream 3 points. As a whole, the mid-stream area received a high score in the natural road assessment. However, the middle two points and three points were relatively low. It is judged that the two middle points are due to a lot of transverse structures and suspended matter. The middle three points are because the diversity of flow and the water smell are relatively low.