The objectives of this paper are to establish a theory and techniques for the creation of scenic green space for enhancing human life, and to demon・ strate the results of technical methods of landscape analysis. It is considered that plant life forms are the most important and basic elements of the non-urbaned landscape on green space. Therefore, in this report, the author suggests that green space are characterized by various com・ binations of types and its elements of life forms, and that landscape archi・ tecture techniques should be determined after giving consideration to the relationship between landscape and life form. In Chapter 1, the author postulates that green space landscapes can be effectively analyzed by use of plant life form, as a consisting unit, and that the results of the analysis would be useful in determining appropriate methods for the establishment of scenic landscapes. In order to sustain scenic green spaces over long periods, it is necessary to conserve the variation in vegetation in the landscape by human control. It is proposed that three ecological control techniques such as the natural conser・ vation technique, semi-artificial conservation technique and man-made conser・ va tion technique are very effective for landscape architecture. In practical landscape architecture success in establishment of green space landscape would be improved by appropriate application of the three control techniques mentioned above. These techniques can be applied to the whole life form spectrum, if physiognomy of plant forms can be recognized as phenotypical expressions of aggregated life forms. Give this supposition, the scenic factors of forest landscapes which belongs to the green space landscape can be classified in terms scenery factors such as the ollter・view and inner・ view of forests. The former is characterized by natural components of the green space landscape and the latter by its sensory function including amenity and serenity for human life. From this standpoints, the author analyses and indicates the function of treated forest landscape composed of a variety of life forms and their functional elements which combine to form the scenic outer-view and inner-view of forests. Further, the ecological structures of vegetation are investigated and analyzed as to their community types, by backgroud vegetation and pattern of spacial distribution and other attributes to obtain the necessory basic data for determining stable conservation patterns. The planned landscape which is conversive under natural condition can be achieved by using conservation works which function to ensure ecological stability. In Chapter 2, the author proposes that, on basis of the knowlege obtained in Chapter I, methods of landscape architecture and conservation works can be effectively applied to the practical creation of green space landscapes and to the symbolic use of life forms. In this study, the investiga ted areas are selected on the basis of various types of physiognomy so as to allow results which are universal. Universal physiognomies (natural forest, substitution forest and artificial forest in climatical horizontal ~tl1d vertical zone) and characteristic physiognomies (glass land, water side and rock vegetation) are investiga ted and analyzed, in order to broadly comprehend the various types of vegetation in Japan and to be able to widely apply proposed conservation works to all cases. The purpose of Chapter 3 is to establish a control technique for vegetation conservation works for the creation of green space landscapes described in Chapter 2. Technical experiments regarding conservation treatment were conducted in regards to the natural vegetation in the Kyushu University Forest where the scenic value has already recognized to a considerable extent. The sites of these experiments are located in the Miyazaki Prefecture (high elevation area>700 m; the vegetation of which belongs to the cool temperate forest type), Fukuoka (: Kasu