Abstract:The paper discusses the impact of natural sciences such as artificial intelligence technology to Jurimetrics, computational law (or computational jurisprudence) and cognitive law (or cognitive jurisprudence) from the perspective of technological development and interdisciplinary. It first proposes the theory and definition of cognitive law, including its research scope, studying meanings and academic discipline, and teases out the relationships among Jurimetrics, computational law and cognitive law. To reduce the subjectivity and provide the objective reference for the vague expression in legal system, some quantitative methods, computational intelligence and cognitive intelligence are applied to legal system successively. However, legal information is open textured and semantic vagueness, and it is difficult to express all kinds of tacit knowledge, process knowledge and fuzzy knowledge by computer symbol system. Cognitive intelligence stresses to improve the ability of intelligent systems to understand data, express knowledge, reason logically and learn by themselves. Following the footsteps of technology, it will be the inevitable trend stepping from Jurimetrics and computational law to cognitive law. Cognitive law improves the understanding of legal rules and analysis of legal behavior, and enhances the interpretability of intelligent judgments by utilizing cognitive intelligence. As the sub-branch of cognitive social science, cognitive law will improve traditional legal theories, promote the deeply integration of the Common law system and the civil law system, and is expected to be a new interdisciplinary subject.