Based on the statistical analysis of various paroxysmal environment events, the causes and the characteristics of the event was reflected by7 factors and 17 indexes, which was quantified by factor analysis. Then, analytic hierarchy process was used to confirm the weight of the factors, which was used to present risk level of an industry. Additionally, according to the system of “hazardous substance amount enterprise environment risk environmental receptor condition” an environmental risk classification matrix was constructed and a method including “environmental risk sources identification” and “risk source classification” was established. It shows the environmental risk identification and classification system is reasonable and feasible and it will benefit the environmental risk management of industrial park.