With the formation of European Union, the frontier function which was existed among the member nations was vanished. The European Union, each national government, and local or regional self-government search actively for the transfrontier development strategies in order to make the underdeveloped transfrontiers an united internal region of European Union with an augmentation of mutual activities inter-transfrontier and a cooperative development of transfrontier. On the transfrontier among France-Belgium-Luxemburg which was the iron industry center of Europe, the cooperative development strategies(P.E.D.) of the inter-government and inter-local are executing for the restructuring of the stable regional economic on the basis of the INITRREG program of the European Union. In recent years, the locals self-govemments transfrontier are executing not only restructuring of regional economic but formation of urban community with the unification of the urban and regional planning, administration, and society.