The invention discloses a method and a system for law aid decision-making in a power enterprise service. A monitor center is connected with service terminals in all places through a wireless communication network or a wired communication network; an expert consultation channel promotes power enterprise service staffs of the service terminals and experts of the monitor center to perform law consultation; the service terminals exchange information with a database through the monitor center, store legal bases, legal provisions, former cases, typical cases, various forms and expert experience in the database in advance, and help the power enterprise service staffs to make correct judgments and give out correct corresponding forms; and handling results of the power enterprise service staffs are referenced when the enterprise service staffs handle similar problems in next time. According to the method and the system, an advanced electronic information technology, an artificial intelligence technology, a computer technology and a network database technology are adopted, so that the intensity, efficiency and effect of service-by-law of power enterprises can be improved to a great extent, and the enterprise benefits and user rights and interests can be abstemiously maintained according to the law.