Abstract: The purpose of this study is to explore the concept of the cyberspace and to apply it to the architectural design plans by replacing the intrinsic characteristics of the cyberspace with the architectural planning elements. For this purpose, this study grasped the architectural spatial meaning of the cyberspace and proposed to apply the concept of the cyberspace to the architectural planning elements. The concept of the cyberspace applied to the proposal of this study is summarized as follows. First, the concept of the cyberspace which is dominated by the concurrency and the immediacy has floating attributes of the form, the function and the structures of the space. It also provides the possibility of the free space setting which is not fixed. Second, the characteristics of space in the cyberspace where the time and the space appear concurrently are determined by the continuity of the interrelationship between the space of the building and the external environment. Third, the cyberspace that extends into a dynamic and variable space which does not have a clear boundary between the outside and the inside can be realized as a fluid space of a transparent form or a translucent shell having both the forms and the functions simultaneously. This study focused on the essential characteristics of the cyberspace which is psychological space recognition based on the human cognitive structure and showed the possibility to go beyond the limits of the existing space by applying it to the architectural design plans.