Abstract:Objective：To explore the effect of optimization the process of self-service terminals servers based on Theory of Constrains in improving the utilization rate of self-service terminals servers. Methods：The outpatients in the First Hospital of Nantong from January 2018 to July 2018 were selected as the objects for study. The first stage of the study is to investigate the status on self-service terminal servers use for the outpatients and to explore associated reasons by applying Theory of Constrains；the second phase aims to optimize process based on the survey results，and to compare the utilization rate of self-service terminals servers before and after optimization flow. Results：After the application of optimization flow，the utilization rate of self-service terminals servers was increased from 2.71% to 41.33%（x2=2 006.77，P < 0.001）；the waiting time of registration and charge in the optimization group was（8.39 ± 0.60）min，which was lower than before（27.31 ± 4.22）min（F=35.748，F＜0.001）；the patients’ satisfaction was significantly improved（F=21.652，F＜0.001）. Conclusion：The optimization flow of the self-service terminal servers based on Theory of Constrains can improve the use efficiency of the self-service terminal servers，shorten the waiting time，and improve the consultation experience.