Building height management is one of the most difficult problems for Landscape management in such a fast growing country as Korea, whose annual economic growth rate continues to be six to eight percent. Due to the extremely high land price and the growing demand for office and living spaces, high building are unavoidable in Korean cities and suburban areas. However, it is very difficult to decide the acceptable limit of the building height because there are so many factors in deciding the acceptable building height. Building height control policy needs to be based on the perception of general public. A strict control without public support is hard to succeed and a loose control might spoil the existing harmonious landscape. For the determination of the allowance limit of building height, two design principles, i.e., harmony and contrast, need to be considered at the same time. From the view point of 'harmony' lower building were found to be desirable, but from the view point of 'contrast' higher buildings were found to be desirable. This study focuses on the decision making of the acceptable limit of high buildings based on the people's perception of harmony and contrast between the proposed building and its surrounding environment. For the provision of a successful building height control policy and for the enhancement of landscape quality, scientific and systematic research on the perception of general public needs to be further carried out.