1. A learning apparatus of an intelligent system that automatically controls a system on the basis of information about events generated in an external environment or services input by a user, the learning apparatus comprising: a rule management device determining whether rules extracted from event data or service data are the same as rules already stored in a rules disc storage, generating queries about the confidence of new rules and providing the queries to the user if the rules are new rules, and updating the rules on the basis of user's answers; and the rules disc rule storage that stores the rules in a confidence region or a non-confidence region depending on the confidence of rules input by the user.