Major Emergency Content Analysis Based on Content Analysis Method

For the current chaotic situation of the major emergency concept,this paper uses content analysis method to analyze major emergency concept based on the 51 influential concept of domestic and foreign literature from1998 to 2008.Refine 11 standards to represent the concept of 51 major emergencies occurred frequently,and by identifying these standards,re-structures the concept of emergency.The major emergency is defined as " the malignant events that can not be predicted,influences strongly,covers a wide range,harms harmly,but can be controlled,and needs urgent management".