Nowadays we can trace different types of legal regulative interactions when we are talking about all the relationship which is taking place - in part or whole - outside the territory of a nation-state. These communications are described by a group of the theorists Under title of  "Transnational Law Theory". The theory of transnational law as a theory with not a long history, has raised many issues. the evaluation of the theorethical basis for the emergence of transnational law and its implications are two important issues in the realm of study of the theory of transnational law, which provides the scholars with the two theoretical foundations necessary in this regard.
From the point of view of the theoretical foundations of the emergence of transnational law, it can be argued that transnational law has been influenced by two different factors, namely pluralism and universalism, both of which are the consequences of globalization.The theoretical foundations that explain how transnational law is conceptualized, can be regarded as the  ones of the most recent theoretical achievements of  law, which is an attempt to imprint the Patterns and Designs of transnational law. The richest and most powerful of these theoretical foundations can be considered in the school of legal positivism and legal sociology.