Artificial intelligence is a tool that is increasingly present in the development of daily activities carried out by human beings, and, to this extent, it is applied in different sectors such as the field of Law, mainly in relation to judicial decisions. This article aims to resolve different questions that exist in relation to the application of artificial intelligence to judicial decisions, analyzing whether it is useful, whether its implementation is feasible and what are the consequences when an expert legal system participates in legal decision-making. As a result of this academic and theoretical research, it is determined that the participation of an expert legal system in judicial decision-making has the main implication of increasing legal certainty in the judicial system, as a consequence of an increase in trust in it. Such an increase in confidence, accompanied by the greater speed of the administration of justice, can justify the costs of its application. Despite the advantages, it cannot be ignored that the responsibility for these decisions will always fall on the human being, for the specific case, on the judge.
