The main method of collecting information is to check the medical records, which is an important way for the quality control officer to understand the patient's condition, the treatment process, and medical costs. Secondly, it is on-site inspection, the quality control officer can go to the medical institution on-site observation of medical equipment, environmental health, etc., in order to understand the actual situation of the medical institution. It is to ask the informants, the QC can communicate with patients, family members, doctors, nurses and other people to understand the quality and effect of medical services. Listening to the statement of the person concerned, the quality controller can listen to the description of the patient or family members to understand their satisfaction and dissatisfaction with the medical services.