In the transition from modern architecture to contemporary architecture, architects who are oriented to digital architecture have begun to embody free-form architecture with a high level of complexity by actively using digital technology in new works, which was difficult to imagine and implement in a previous way. In particular, with the advent of new materials, the introduction of material transformation and processing methods using digital technology has brought about a paradigm shift in implementing architectural forms, breaking away from the previous way of using architecturally common materials. Amid this trend, membrane surface, which were not conventional shape and form in the field of architecture, have recently become easier for architects to design without physical knowledge due to the development of parametric design tools that can easily change the material morphology. Hence, they have begun to be widely used as surface to build the skin or shape of a general building without their conventional recognition. In this study, the tensioning technique is used to define the deformation technique of the membrane surface and establish a new classification system among digital morphology techniques. Afterward, the newly developed methodology for the membrane surface is established by systemizing the type of shape generation using the established deformation technique and presenting the design process. This design methodology is meant to support the methodology for realizing the architectural shape by using the membrane surface from the actual designer's point of view and to explore the possibility of using it.
