Abstract: To optimize the allocation of resources and make the economic development especially the real estate sustainable in Shenyang, such existing problems as the gross area of urban land oversupplied and imbalance spatial allocation with imperfect structure have to be solved. Based on the data from 2002 to 2006 and taking the area of land supplied and investments in fixed assets as input units, with land-grant fee and GDP as output units, the DEA (data envelopment analysis) or C²R model was made to evaluate the overall efficiency and the efficiency of space/usage structure of land supply in accordance to an example, then the values of input redundancy and output deficiency of unit index in decision making were calculated. Furthermore, some suggestions were therefore offered about the improvement based on projection theory for the non-DEA effective years, thus realizing the benefit prediction after improvement. The method mentioned above will be of importance to the evaluation of urban.