This study focuses on alun-alun which is traditional open space in Indonesia. There is not enough open space in Indonesia, so alun-alun is precious place. Recently alun-alun has disappeared because of government policy. In this study, it reveals the influences to people’s understanding and action by the change of alun -alun. The object of this study is students of Bogor Agricultural University. The research methods are questionnaire and interview. As a result of this study, the following facts have been revealed. The first point is about alun-alun’s familiarity and specialty. More than 90% students know alun -alun and have been there. And 76% students think alun-alun is special space compared to others. The followings are chosen reasons:“meeting place”, “special place”, “feature characteristic”, “relationship with city”, and “history”. The second point is aboutchange of alun-alun’s structure. 65.2% students think alun-alun structure’s change is good. That reasons are “variety of activity”,“improvement of design”, “improvement of facility”, and “passage of time”. The third point is about people’s activity. Then, it isfound that especially the activities such as ceremony and sports that need wide space shows difference.