There are five suggestions on interrelationship between Hew Development and Preservation of the Environment. First, it is necessary to make the Perservation of the Environment the prime object of the national land development instead of the New Development. Second, the planners and the designers of the land (or city) must sufficiently understand the concepts that make friends with environment. Third, a policy planners need to understand the concepts that make friends with environment and the concepts must be involved when the policy is projected. Fourth, the criteria to evaluate the quality of the New Development must be changed from only the beautiful ones to both the beautiful and the ecological ones. finally, it is necessary to decide on the policy of the environment in cooperation with the developer and the preserver in consideration of economic, environment, and development indicators.