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The popularization of IOTIS makes the intelligent security system develops toward integrating, systematization and humanization. The intelligence security system integrated.This article focuses on the study of IOTIS, carries out analysis on current situations of disaster early warning system in both domestic and abroad, and develops a wireless self-organization network based disaster early warning system with intelligence speech interface. This system not only solves the problems in information releasing of conventional disaster early warning, but also makes the interactive experiences of the system better and initial realizes the intelligentize of disaster early warning system as well. Finally, this article validates the operation of disaster early warning system with intelligence speech interface system through experiment.