The purpose of this study is to clarify the features of architectural design, especially focused on the space cognition of design process, and to propose a educational method for designing. The students' design process were searched by protocol analysis. The architectural space "viewing" is defined as the scene of space cognition and consists of 'point of view', 'way of view', 'object', 'design object'. The results of this study are as follows; (1) The architectural space "viewings" are divided into 10 types. The four types of them (Spo, Sp-o, Sp-oo, Spo-o) are used frequently and recognized at the first term to the end of the design process. The others (Spoo, Sp-o-o, Sppo, Sp-p-o, Spp-o, Spo-p) are used scarcely and recognized at the middle term of it. (2) The individuality of architectural design is perceived partly at the bias of these "viewing" types. (3) There are some stems of the architectural space "viewing" at the design process. These stems are one of the structures of space design. And the union and the division of some types of the "viewing" and the connection of two stems are characteristic in space cognition of architectural design.