Good Corporate Governance is the definitive system to regulate and control the company to create value-added to all stakeholders. The concept can be interpreted of Good Governance in Indonesia. There are two things that are emphasized in this concept. First, the importance of the right of shareholders to obtain information correctly (accurately) and timely. Second, the company’s obligation to make disclosure is accurate, timely and trasnparan to all information of corporate performance, ownership and stakeholder. This type of research is a kind of juridical empirical research. This study on the effectiveness of the law, namely Legal Information Systems Company On Enterprise Bank in Implementing Good Corporate Governance. This study is limited to the legal aspects of good corporate governance of banking, in particular systems company policy, in particular the company’s decision-making system,the implementation of the decision making proces accountable, fast, and accurate, which determines the performance of bank corporate governance. Good Corporate Governance provisions have not been able to support the banking corporate governance, as expected, especially in terms of decision-making performance. Becausethe unavailability of adequate Legal Information System whichcan be used as abasis to organize the decision-making process that is fast and accurate. Slowness and hesitation in making decisions on some banks are generally determined by the availability of Legal Information Systems Company which is a data bank on bank policies that have been established.