Abstract: There are two draw backs in current decision making approaches,i.e.,the real risk attitudes of decision makers are rarely reflected,and the efficiency or the effectiveness of coordination and learning are difficult to ensure in current approaches.To over come above draw backs,a double plat form mode for deriving decision information and a structure for learning and coordination between double plat forms are established.After that,single platform model for learning and revising decision information,double platform systematic model for coordinating basic prospect values and double plat form learning and coordination analysis method are proposed.The proposed new model and method can not only employ value plat form and risk plat form to derive the decision information efficiently in allusion to two levels'dist ributing know ledge structure,but also coordinate diversity decision making information,and thus to make decision scientifically and effectively.A Monte Carlo simulation case shows the new model and method are scientific,reasonable and well applicable.

Key words: two-level group decision making, value platform, risk platform, double platform learning, double plat form coordination, prospect theory