The methodology for the foundation of an agricultural land resource dynamic evaluation model was discussed in this paper by taking Dongying city of Shandong Province as a case study. The result shows that it is an effective way to evaluate agricultural land resource dynmaically by means of using Peng Buzhou etc three men's method of “change weight” for reference, which they used to evaluate the environment synthetical quality, regard it as the model of evaluating land resources and combine it with GIS.