The Museum of Natural and Environmental History, Shizuoka, was set up in a vacant school. Space concept is “Thinking.” Each exhibit room recreates a school setting (e.g., chairs, desks, blackboard) and aims to stimulate thinking by showcasing the exhibit theme indirectly. Also, signs that symbolize the exhibit themes are shown in the hallways. By using an integrated design for exhibit spaces and graphics, the entire museum becomes a space that encourages thinking. Using the old school premises and furniture lowered construction costs and reduced the environmental load. Therefore, the museum is a facility that symbolizes a new building stock era for a sustainable society.