Development law and environment law in Korea have kept system, adopting the result of spatial assessment directly as methods for ecological urban management. The result of these spatial environmental assessments is a foundation of the connecting system between spatial planning and environmental planning to develop sustainable further studies. On this premise, this study was to suggest the applicable alternatives that are able to be an effective method of assessments for ecological urban management. Analyzing its disadvantages, advantages, and characteristics, after reviewing the kinds and contents of spatial assessment, has been used currently on process in Korea. These studies on model development, a major issue, should keep being achieved as systematic environment planning, which could be inter-related with development planning. Therefore, it is desirable that the result of assessments on the developed spaces would be adopted from considering the domestic conditions for environmental development planning and management step by step. Also for environmentally friendly spatial planning and management, it is a way to go to consider the environment planning and ecological assessment on the detailed planning step at the level of district and zone practically. However, many assessment maps in Korea are not enough informative ecologically at the applicable level on this step. Prior to these detailed information, if the result of spatial planning at the present national level would be used concretely at the level of urban comprehensive planning, this is to be also a fundamental approach for the ecological spatial planning in the given situation.