This article aims at outlining the approaches of the international community, the BRICS countries, and other countries that have achieved noticeable results in the development and use of artificial intelligence in the military sphere to answer the questions about the applicability of the existing international humanitarian law in a military conflict using Lethal Autonomous Weapon Systems, and the extent of this applicability. Based on analytical reflections on information drawn from referenced sources, the authors analyze the provisions of national and international approaches, legislative instruments, and documents that create patterns for developing lethal autonomous weapon systems and the potential for the use thereof from the standpoint of legal attitudes. The authors’ results are presented in a set of approaches of national legal systems and doctrine provisions found in the current law in the field of research, including from the standpoint of a contribution to the further improvement of the concept of lethal autonomous weapon systems.