To do 24-hour ambulatory blood pressure monitoring, first go to the hospital and the doctor in the measurement room will attach the recorder to the body with a band and the cuff to the arm, and the two will be connected, while setting the interval for blood pressure measurement, which is usually set to every half hour. After the steps in the hospital are completed, the patient can take the recorder and blood pressure cuff home with him/her. The cuff or recorder cannot be removed during this period, which means that it needs to be kept with the patient 24 hours a day, even when sleeping, to be able to measure the blood pressure for 24 hours. At the same time the next day, the doctor will take off the cuff and the recorder, connect the recorder to the computer and then copy the recorded data to produce the results of the 24-hour ambulatory blood pressure monitoring, which is the entire 24-hour ambulatory blood pressure monitoring test process.