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Virtual reality has always been an important topic in the research of architectural safety. Though a lot has been achieved towards the disaster’s scene simulation, the damage of disasters is not efficiently controlled yet. After the cross subject research, the author finds out that sudden events can trigger people’s mal-behavior. Those unreasonable behaviors hinders people a lot from taking advantage of architectural safety design, thus greatly devaluate the work of scene simulation, which aimed at architectural improvement. Without the evaluation of human behavior, the traditional research is limited in idealized architectural function. It is necessary, but not enough,In this paper, through the analysis of virtual human simulation and virtool programmatic, a“virtual system of human behaviors under the sudden events”is designed and constructed. In this system, controlled by tester or program, the virtual characters can not only wander around the scene, interactive with fire or each other, but also play different animations according to varies condition. After the simulation, the tester’s responsive behavior can be recorded and played from multi-angles, which make it possible to evaluate the behaviors objectively. At last, by adding the tester’s behavior to system character, a visual knowledge base of“human behaviors under the sudden events”is established.This system is functioned both as an escape training platform and also a behavior knowledge source. For the testers, by using this system, they can establish good escaping habits, which is crucial under emergencies; for the researchers, by analyze the knowledge base, they can get a better understanding human behavior, thus make the safety design more humane.
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