Nimbys Movement is the important form of the conflict between environment and society,and contains social risk to be developed to environmental mass disturbance. The complexity of the cause of its evolution and its evolutional path makes the transformation process from Nimbys Movement to environmental mass disturbance still short of a powerful explanation framework. Based on emergence theory, this paper constructs complex systematic science SD model of Nimbys Movement, and reveals its emergence mechanism and its inner logic and evolution path to be transformed into “environmental mass disturbance”.The emergence of Nimbys Movement is a complex process of interactive multiple overlaps between systematic emergence subject, inner emergence mechanism and external emergence mechanism, and goes up to environmental mass disturbance after the breakthrough of the critical state of selforganization. The simulation of “Lianyungang Antinuclear Rubbish Event” shows that the prevention of environmental mass disturbance should control the critical scope of Nimbys Movement, strengthen information disclosure and optimize internet ecology.