The Korea urbanization has been accelerated without regard to regional traits and the environment. Most of rural areas have been overurbanized with proper and long term plan. Especially the case of Yongin-community which is located 50km south of Seoul reveals a typical wrong urbanization policy. Evidence of such wrong policy is proved by this study for last three decades(1970-2000) in political economic approach with special reference to the Manuel Castells' theory. The study concludes that urbanization with no proper development plan is mostly vulnerable and wasteful. And the environment is once spoiled, it is almost impossible to recover, so it is necessary for us long term and proper plan before development.