An apparatus and method for correlating events in a smart home system as a pattern. The apparatus and method include collecting from smart home devices, state change events of the smart home system, determining whether a series of the collected state change events are a known pattern, requesting, when the series of the collected state change events is an unknown pattern, users of the smart home system to identify what caused the collected state change events, and judging, by the smart home users, a best reason among the identified causes of the collected state change events.