1. A device for processing rules based on web services comprising: a rule storage storing rules describing an event, a condition to be satisfied by the event, and an action to be executed when the condition is satisfied; a rule engine retrieving a rule describing the event from the rules stored in the rule storage when an event occurs; a condition inspector inspecting whether or not the event satisfies the condition described in the retrieved rule; and an action executor executing the action described in the retrieved rule when the event satisfies the condition; and a local rule manager storing the rule requested to be registered when the rule is requested to be registered by a service requester and does not generate a static conflict in which the rule requested to be registered describes the same event and condition as those of another rule but describes an action that cannot be simultaneously executed.