The informatization construction of the court is an important subject in the field of the rule of law construction and judicial trial under the background of rapid development of information technology. Since the beginning of 1996, the informatization construction of Chinese courts has focused on the informatization of the trial mechanism. Its purpose is to improve the quality and efficiency of trial work through the effective application of information technology in trial work. The exploration of judicial informatization should not only focus on the integration and application of new technologies such as big data and artificial intelligence, but also pay attention to the theoretical and practical issues of the existing informatization mechanism of the court. Through the systematic review of the online court, trial live broadcast and electronic signature, the problems of the current information system can be effectively found and solved, which has important theoretical and practical value for the further development of judicial informatization.