Patients experience some degree of pain accompanying all surgical procedures. If this pain is not adequately treated, it will cause severe physiological and psychological damage. It will even affect patients' postoperative recovery. However, if preemptive analgesia is administered before noxious stimuli arise, rather than afterwards, it is significantly more effective. The purpose of this study is to recognize that reasonable effort and time should be spent to determine a patient's tolerance level towards pain before surgery. Then, the appropriate dosage of analgesia can be given immediately after surgery to alleviate pain. By administering effective pain relief, it will improve patient¡¦s satisfaction with medical services. Using classic experimental design (which consists of an experimental group and a control group), this study focuses on cases of patients who had hemorrhoid surgery in a certain hospital in southern Taiwan. The experimental group and the control group consist of a total of 75 valid samples. The experimental group received customizing analgesic postoperative care, while the control group received conventional analgesic postoperative care. Patient¡¦s satisfaction questionnaires were gathered from patients on the day they were discharged from the hospital. Instruments used in the experiment include VAS, PThM, and patient¡¦s satisfaction questionnaires.To examine the basic characteristics of the samples in both the experimental group and the control group, two statistical methods, Chi-square test and independent T test, were adopted. For patient¡¦s satisfaction questionnaires, Mann-Whitney-Wilcoxon test of nonparametric method was adopted to examine if obvious differences in satisfaction levels existed between the two groups. The result of the experiment shows the analgesic effect from customizing analgesic postoperative care is far better than conventional care. The patient¡¦s satisfaction toward the doctor's professional skill was higher as well. On the other hand, the patient¡¦s satisfaction level toward the whole medical process had no obvious improvement. This study proves that customizing analgesic postoperative care can effectively prevent postoperative pain from occurring. However, to raise patient¡¦s satisfaction towards the whole medical process, better professional medical skill is required as well as improved medical services.