Abstract: The event driven characteristics of cyber physical system are discussed. Aiming at the defects of the current frame event model,which is the life cycle and the fusion of events are not considered enough,in order to ensure the validity and legitimacy of event response, the multiple group representation of the event is given. Multiple groups include the type of event, the observer, the occurrence of the object, the time and place of the occurrence, the variables that describe the variables, and the reliability value. Through the simulation of unmanned aerial vehicle formation control based on event mechanism, the validity of the method is verified.