Abstract: Based on cultivation experiment with the different nitrogenous nutrition level, by the method of linear stepwise multiple regression, constructed prediction models of dry basis moisture content and leaf dry matter to leaf area of cucumber leaves using color feature parameters. The results of statistic analysis showed that there were some relationships between color feature parameters [ such as S、G/(R+G+B)、B/(R+G+B)、G/R、G/B、G-R and H/S] and leaf dry basis moisture content, and between color feature parameters [ such as S、G/(R+G+B)、B/(R+G+B)、G/R、G/B、G-R、H/S and H/I] and leaf dry matter to leaf area. G/(R+G+B) and G-R are the best parameter of estimating cucumber leaf dry basis moisture content, and H/I and G/(R+G+B) are the best parameters of estimating cucumber leaf dry matter to leaf area.