An event distribution method, a control device, and a processor on a software-defined network (SDN), where an event distribution module processes, in a preset order using a first workflow that includes at least two event processing nodes, an event that is generated by a device object generating module, and sends a processed event to a first application program processing module using a first application event processing node. The first workflow is created according to an instruction of the first application program processing module, so that the event that is sent to the first application program processing module can be processed according to the instruction of the first application program processing module. Therefore, the event that is sent to the application program processing module does not need to meet a predetermined requirement.