In any type of legal relationship, the subject always plays an important role, and is one of the signals to determine the relationship that concerns the adaptation of any legislative system. International law is a legislative system made up of a set of thousands of documents from various sources. Research on the topics is necessary as it helps to find out the source of the law, the relationship of which concerns the adaptation of the law. Subjects of international law include sovereign states and similar entities, intergovernmental organizations, individuals and multinational corporations. First of all, it is necessary to know the definition of subjects of international law. From the perspective of legal theories, the identification of subjects of international law must be based on the following fundamental signals: participation in international legal relations that are regulated by international law; have a desire for independence in international activities; have full rights and obligations separately towards other objects within the scope of the adaptation of international law; ability to assume international legal responsibility for acts committed by the subject. In general, objects of international law are entities that participate or may have the ability to participate in international legal relations independently. They have all international legal rights and obligations for acts performed by object. As for the power of subjects of international law, it is the fundamental properties, the special legal capacity of the subjects who inherited rights and assume obligations, legal responsibility in international legal relations. The power of subjects includes two aspects, and only when all these two aspects are understood...... half of the article ......ReferencesAcquaviva, G, 2005, 'Subjects of international law: an analysis based on the power', Vanderbilt Journal of Transnational Law, viewed 7 January 2011,.Hamid, AG, 'The topics of international law', viewed 7 January 2011,SUBJECTS%20OF%20INTERNATIONAL.pdf>.Queen's University Belfast 2011, subjects of international law, Northern Ireland, viewed 7 January 2011, Library/>.Wikipedia Contributors 2011, 'International law', Wikipedia, The Free Encyclopedia, 6 January, viewed 7 January 2011,.