This research and development aims at building user’s safety in daily life for a public architectural space and also has aimed to construct the knowledge base which has accumulated the accident case, knowledge concerning the prevention of accidents, and the measures technology. In the background of this approach, the falling accident has become a problem by aging society. The knowledge base defines the patterns of the accidents, and has described the accident measures idea of the each pattern. This knowledge base has been open to the public on the Internet since August, 2009.
