The main purpose of this research is to probe into if doctors' commitment to organizational culture will influence their service quality, and the satisfaction degree of patient's perceived service quality, and the cognitive gap of service between doctors and patients. Our samples are doctors and their IPD patients in a regional hospital in Taichung city in Taiwan. The result shows that there is significant difference between the doctor's organizational culture commitment and service quality. Namely commitment to the organizational culture the higher degree is, the higher its mark of service quality is, the more satisfied the patient is. In the patient expectation and experiences actually, the majority is to present the negative situation, it mostly state that is unsatisfied. And then come up to look by the comparative analysis of the service attention degree of the doctors and their patients, eight are negative in 11 items, and four of them are significant. It is worth the hospital administrators and doctors weighing and thinking deeply