本研究於玉峰溪旁的玉峰水位站，設置一生態觀測站，運用水中攝影機觀測玉峰溪之棲地情況與河川魚類的出現次數，並由經濟部水利署北區水資源局取得之水文資料，運用非線性迴歸分析出水位-流量率定曲線，因而得到平均流速及平均水位，再配合攝影機於玉峰溪之有效攝影範圍的斷面資料，與玉峰溪之總斷面資料的關係，推估出有效攝影範圍斷面的平均流速及平均水深，最後將魚體出現次數予以標準化處理（最大值為1），配合有效攝影範圍斷面的平均流速與平均水深，制定一針對玉峰溪河川魚類，建立其水深、流速等棲地適合度曲線，並與國內學者以不同方式，針對不同指標魚種，所制定之適合度曲線，加以比較。 This study set up an ecological observation station in the Yufeng flow gauge by the river bank of the Yu Feng River. An underwater video camera was used to observe habitat situation and emergence frequency of fish species. The hydrology data provided by Northern Region Water Resources office, Water Resources Agency Ministry of Economic Affairs, were analyzed to get level-discharge rating curve via nonlinear regression. Then the average flow velocity and the average water depth can be obtained sequentially. Comparative studies of cross section parts photoed by camera and the total section of Yu Feng River was evaluated to investigate the average flow velocity and the average water depth in the observation window. Finally the fish form emergence frequency to habitat suitability is normalized （on a scale from 0 to 1）. The study utilized the average velocity and water depth pictured by underwater video camera to establish the curve of habitat suitability, aiming at fish in Yu Feng River. Moreover, this habitat suitability curve was examined to compare with different fishes and different methods devised by other researches.