Architectural design means to not only structural formation but also consideration about every aspect. Architect constructs the best architectural design by architectural inspections which are based on a lot of knowledge, experience social, circumstances, and so on. However, if each architect designs architecture in the same site and requirement, they make design different. That's to say, factors to design architecture are not only external requirement but also internal sense, and each people has different internal sense. This research is about investigation of architectural design process and architect's thought, we examine them based on analysis of guidelines for architectural design competition and presented work. Then we aim to find relationship between architect's planning idea development and design suggestion.