This report describes the method of the exhibition " The Power of Setagaya Town and Life " held in 2024, which displayed the accumulation of 50 years of community design in Setagaya. The exhibition was organized in five parts. The first and second parts aimed to show the expanse of time and space, and to form a sense of distance between each audience and the community design. The third, fourth and fifth parts were structured according to the actors - government initiative, resident participation and resident initiative - to enable the audience to understand community design from their own perspective. This method is a way of displaying the development of community design in the suburbs of megalopolis, but it can also be considered a universal way of displaying the history of autonomy in a city.