A distributed control method in a distributed control system including a process executed by a by a first notification device, the process including notifying a detection of a first event to a second notification device, storing, in a storage device, acknowledgement information associating an event identifier indicating the first event with a device identifier indicating the second notification device when a negative acknowledgement is received from the second notification device, determining whether the event identifier indicating the first event is stored in the storage device or not when a request for a notification of the detection of the first event is received from a third notification device, and deleting, from the storage device, a device identifier associated with the event identifier indicating the first event when it is determined that the event identifier indicating the first event is stored in the storage device.