The Hospital accrditation program in Taiwan was launched first time in 1978 for the purpose of assigning teaching hospitals as practice site for medical students. The enactment of the Medical Law authorizes the Health Department to be responsible for supervising the hospital accreditation program in coorepration with the Ministry of Education. Since then the database are available. This research aims at comparing the evaluation data of the two accreditation programs. The findings are as follows: 1.The total scores of medical centers and regional hospitals between the two accreditation runs are not significanlty different, while those of district teaching and district non-teaching hospitals differ significantly. 2. The facility installment levels of medical centers, regional hospitals and district teaching hospitals between the two accreditation runs are not differnet whild that of district non-teaching hospital has significant progress in installment level (Kidney dialysis and infant bed are exceptions). 3. The medical related personnel staffing level of district non-teaching hospital has significant increase between the two accreditation programs, except residents, physical therapists, and social workers. Medical Centers have significant increase in the medical record management personnel while regional hospitals recruit more nuclear technologists significantly. 4.The productivity of medical centers and regional hospitals do not differ significantly between two accreditation runs while district non-teaching hospital has significant lower productivity amount in emergency care services but has significant higher amount in other services. Owing to the difficulty in quantifying services, the current accreditaiton program focus mainly on structural explarotory investigation. The facility installment level, personnel staffing level and productivity amount seem all have progressed as were expected by the Health Department. In terms of the findings, the district non-teaching hospitals seem to reflect the most satisfactory result toward what are expected. The guiding power of policy are shown meaningful. The development of objective process and outcome indicators are thus highly recommended.