Fire prevention planning is based on requirements in building regulations and laws. It's unclear how much its effective safety is. It usually doesn't consider its cost. Building regulations and laws will be rewritten on the performance in fire prevention. This paper suggests the system that evaluates evacuation safety, and that considers the fireproof cost. This system estimates the cost with public data and estimates evacuation safety with the comparison of smoke behavior and people's one under fire. Finally we applied this system to a model of office building and made clear effective fire prevention planning and their combination.
