Abstract: the harmony between science and technology and law determines the degree of human civilization. With the rapid development of S&T, the law is playing a more and more important role, and the fusion of S&T and law has been paying more attention. Firstly, this paper study the characteristics of the fusion of S&T and law. Then, it discusses the inevitability of the fusion of S&T and law from the perspective of philosophy, the history of S&T and the jurisprudence. Finally, the paper discussed the objective and the path of the fusion of S&T and law.