Because real estate development valuation investment decision have many considerable factors, than they will influence each other, some are invisible, even some do not to quantity, that all increase decision's difficulties. This research will by the Analytic Hierarchy Process (AHP), developing a set of decision support valuation system to help the real estate development policy reference. Study result Analytic Hierarchy Process method to calculate three land individual cases value a row the preface and government to arrange a preface homology to three land announced land current value.