New century turns out the intensive scientific revolution, which leads to the extension the digital technologies. The research is devoted to the analysis the opportunities and prospects for the implementation of the artificial intelligence in the legal system. The urgency of the study predetermines by the large-scale digital revolution that affects all spheres of society, including the area of legal activity (for example, the initiative to use lawyers-robots in the legal corporations; the idea to automate legal activity; the appearance of smart contracts, blockchain technologies, cryptocurrency, which are not regulated by the Russian law yet; increase if the cybercrime and others). The purpose of the study is to analyze the advantages and disadvantages, opportunities and limits of introducing the digital technologies into the legal environment. Research methods are analysis, synthesis and comparative law. The study contains several positions. Firstly, the analysis the points of view about the theme of research among the national and foreign scientists are presented. Secondly, the comprehensive assessment of the artificial intelligence influence on the legal sphere is given. Thirdly, the opportunities for regulation changed relationships, connected with digital technologies, in the current Russian legislation, and the advantages and disadvantages of fixing new categories in the Civil Code of the Russian Federation are researched. Fourthly, examples of the negative impact of legal vacuum on the law enforcement practice and the ways for its overcoming are given. By the way, specific decisions of the courts given as the arguments. Fifthly, the analysis of current trends in the introduction of digital technologies in the legal sphere in the Russian Federation and in the over countries is carried out. There are some contradictory opinions of scientists and practitioners regarding the possibility of using robotic technologies in the legal system. Sixthly, it presents own conclusion based on the conducted research, which is to substantiate the positive trend towards digitalization in the legal system, but the negativity of the possible effects excessive interference of the artificial intelligence in the legal activity.