The purpose of this study is to suggest the integration of environmental education between South and North Korea in preparation for unification. The results of this study are as follows; Firstly, environmental education in North Korea is in the incipient stage as of the environment protection, the prevention of air pollution. It also emphasizes ideology education rather than sustainability. Secondly, the suggestion for the unification and the synthesizing of its environment together with the 3-stages of unification process. It can be presented as a role and function of environmental education in Unified Korea and consciousness and practical effort for the environmental preservation. In conclusions, the result of this study could contribute macro-view on the integration of socio-eco gab between South and North Korea in preparation for unification.