The understanding of the temperature dependence of the photoluminescence of multimode quantum dot(QD)arrays is essentially important for the realization of efficient photonic devices. The dynamics processes of different density multimode QD arrays were fitted by using the rate equation model. It is shown that,in high dense QD arrays,the intensity of photoluminescence of different QD families behaves different temperature dependence;the intensity of photoluminescence is quenched as the temperature increases in low density QD arrays. In high dense QD arrays,as the temperature increases,the carriers will be thermally excited into the wetting layer from QDs,and then some of them will be recaptured by the big scale QDs,carriers coupling takes place between the different QD families;in low density QD arrays,the carriers transfer between different QD families will be limited. Temperature dependence of maximum of the ratio of photoluminescence intensity of different QD families strongly depends on the difference of thermal activation energies.