The use of artificial intelligence in judicial and criminal justice systems can support crime prevention, facilitate decision-making, and improve the accuracy and transparency of sentencing. However, implementing this technology within the justice system presents significant challenges, including issues related to privacy, data security, algorithmic bias, and ethical concerns. This study employs a descriptive-analytical method and case studies to examine the concepts and applications of AI in the field of criminal justice. In addition to outlining the positive impacts of AI on judicial processes, it analyzes ethical challenges such as the risk of excessive uniformity and reduced judicial leniency. The findings indicate that while AI offers notable benefits for enhancing the efficiency of the justice system, human oversight and the establishment of appropriate legal frameworks for regulating and supervising this technology are essential. The study also presents practical recommendations for lawmakers and legal authorities aimed at improving the implementation of AI within Iran’s criminal justice system in a sustainable manner.