Separation of spatial planning and environmental policy has sometimes led to so-called 'spatial-environmental conflicts' that is discord between the two policies. To solve this problem, the Netherlands has tried to integrate the two through a series of pilot projects since the late 1980s. The integrated area-specific approach to spatial planning and the environment such as ROM projects and the City and Environment project is the result of those efforts. The purpose of this thesis is to get lessons from that approach through estimating the significance and limit of it with respect to applicability to the other situations like Korean reality. The integrated area-specific approach can be estimated to have important meanings such as consensus building approach, the spatial specification of environmental policies, and good applicability to the areas with strong environmental challenge. In spite of this significance, this approach also has risk of failure in consensus building and of the decline of environmental policy. This fact leads to the result that we should go toward integrating spatial planning and environmental policy in the regions just with the precaution.