European integration as it involves many Member States to the legal system, in order to avoid European Community law and Member States within the state laws have inconsistencies in the case. Therefore, founding Treaty on European Community law and the Member States of state laws has a harmonic system, that is preliminary ruling system. If the law of Member States and the European Community is not in line with the situation, the Member States pursuant to a court or tribunal, the European Community Treaty Article 234 to the European Community brought to the court ruling. This paper would like to do on this system on a summary of minutes.