This review is an attempt to analyze the published materials on precedent law of the European Court on Human Rights. The article analyzes the case law activity by the European Court on Human Rights, its influences on national legal systems. The precedent law of the European Court on Human Rights is one of the complicated issues, because there is not general theoretical view on it. The precedent law of the Court is developing and gains new features. The Court uses its previous consequences in previous decisions on a subsequent case as a precedent norm. The Court creates a case law system that influences legal reforms in national legal order.