Brown dipper (Cinclus pallasii), preying largely on aquatic insects, is an indicator species of stream quality. As a habitat specialist along with the nature of being easy to count in number, the bird became an ideal target to look into the relationship between food abundance and breeding performance. During 2013-1014, I conducted my study at the upper section of Taichia Stream where the density and biomass of large aquatic insects, like Trichoptera, the dippers’ favorite, was higher at riffle areas than at shallow water. I investigated 9 and 18 dipper nests in 2013 and 2014, respectively. Dippers inhabiting in stream section with higher density of aquatic insects appeared to lay egg earlier, lay more eggs, have more young fledged, and occupy shorter territory. The breeding performance did not change or become poorer at the same section in year when prey abundance was reduced by more than 27%. By comparison, Chi-Cha-Wan Stream and downstream You-Sheng Stream had highest density of brown dipper. In conclusion, area site of riffle can be used as an indicator of the dipper’s habitat quality.