Abstract:Since the evolution of rationality from complete rationality to bounded rationality in economics,some new concepts including bounded rationality and super-rationality were also introduced into policy area.The discrepancy between demand and supply involves both apparent and hidden demand and the latter is always ignored.The performance loss during policy making process comes from the following three parts: blind point from scarcity of communication,break point from lack of nice prospective and action deviation associated with external restriction.Based on the analysis and measure of performance loss in policy-maing process,this paper puts forward the following methods to remedy the loss: research and making on policy should be finished in scientific and standard way; information on management policy should be specialized ; the behaviour restraint of micro-subject should be known and the policy object should be rationally established; the participation in policy making should be widely spread so that the information can be passed from down to up.