Clothing is first defined as to protect and shield human body, and today it develops to become as shell packing adapting to body shape and activity. In the field of architecture, the development of form is combined with the relationship between ”external space appearance” and ”internal space disposition”; and the essence of architecture form corresponds to interior organization. However, to pursue the liberalization of architecture form often results in non-applicability of internal space function. In this research, it attempts to study the notions and basis to supply free-form architecture from internal to external with the perspective on covering construction of clothing draping, by means of the general characteristics of the form construction concepts between architecture apace and clothing style.