The conductivity of the wheat stored at different temperatures was detected and the surface image of wheat was collected by scanner. The correlation between conductivity and color character of wheat during storage was analyzed. The result showed that the values of R,G,B, and I, and conductivity were highly correlated with storage time. I value was the most significantly correlated with conductivity. The mathematic model of rui xing number 1 was y= 1.3E-16x^8.461 3, Y represents conductivity value and X represents I value, R^2 = 0.869, while the mathematic model of zheng mai 8998 was y= 1.7E-18x^9.278 5，R^2 = 0.913, and that of the two kinds of wheat was y=1.0E-8x^4.593 2，R^2=0.676.