Evacuation guidance and announcement are important for occupants to egress from buildings at emergencies. However, it is reported that the guidance and announcements have not been used effectively in real cases. NIST published reports on WTC collapse, September 11 2001. The reports include data on evacuation behaviors of the occupants and how they got information during their egress. After the Great East Japan earthquake, the Japanese Government conducted investigation how people behaved at the disasters. The evacuation behaviors of people are similar to both cases. The behaviors are categorized into three groups; instant evacuation, evacuation after tasks and emergent evacuation. We present a system that evacuation guidance is implemented as a way of agent communication and show the contents of the guidance change the escape time.