Anti-NMDA receptor encephalitis is a recently-found acute encephalitis. Its initial symptoms were similar to mental illness, and later comes up with dyskinesia and other symptoms. Many female patients would be examined with Teratoma. The purpose of this thesis is to monitor the patients with this disease by using statistic method, and to improve the treatment for patient by monitoring patients’ illness level in different time. The thesis collected the case reports in 79 medical essays, quantified the important part that they mentioned—such as the time that each symptom appears—into usable data, found out the suitable part, and establish the control limits in weeks with the concept of Control chart.