Globally, with the aim of coping with climate change from global warming and realizing nature-friendly development, such as through the reduction of greenhouse gases and efficient use of energies, there is an ever-growing demand for green architectural activities that will create healthy living spaces by planning ways in which both humans and nature can coexist in harmony. With the same goal, Korea has also been holding a number of large-scale high-quality competitions intended to discover best practices of green architecture to cope with climate change and promote R&D for related technologies, as well as to broaden the base of green architectural buildings. In this study, the scope of study involves the award-winning works from "2017 Korea Green Architecture Competition," the most prestigious one in Korea, and an analysis has been conducted on the spatial structures found in the green architectural designs by a total of 10 award-winning works. In the case of the study method, based on the theoretical contemplation of the background in which green architecture came into being and its conceptual definition, the spatial characteristics (spatial structure; windows and doors; landscaping; traffic line, etc.) appearing in the green architectural design by each award-winning work were largely divided into vertical and horizontal structures and then a comprehensive analysis was carried out. As a result of the study, as for the characteristics of spatial structures to realize green architecture, an analysis was done for the pilotis, atrium (courtyard) and wall-surface greening, as vertical structures, and for the elevation pattern, indoor garden, circulating-type structure, etc., as horizontal structures, all of whose effects, including natural lighting and ventilation; heat loss and gain; thermal insulation; minimized inflow of direct sunlight, etc., were analyzed after. Based on these results, this study is expected to be of great help to vitalizing green architectural activities and presenting a vision of future cities and architecture.