With the rapid development of artificial intelligence technology, its impact on international law is becoming increasingly significant. This paper explores the application of AI in international relations and the challenges it poses to existing legal systems, analyzing AI regulation within the current international law framework and the exploration of emerging international legal norms. Through specific cases, the paper elaborates on legal issues in the fields of intelligent weapons, cybersecurity, and data protection, emphasizing the importance of international cooperation and global governance mechanisms in addressing these challenges. Finally, the paper looks forward to future trends in AI technology and international law’s response strategies, proposing the necessity of constructing effective legal frameworks and ethical guidelines to promote the sustainable development of AI technology and the healthy development of the global legal system.