|To assess comparatively the administrative behavior of vaccination and satisfaction of physicians by the provision method according to the National Expanded Programme on Immunization (NEPI) between 2005 and 2006 Demonstration Project in Korea. A questionnaire was performed at 582 and 64 physicians in Daegu metropolitan city and Gunpo city on 2005 (a response rate of 39.3%, 45.3%, respectively). Also, we sampled 31, 56, and 28 physicians in Gangneung city, Yangsan city, and Yeongi county on 2006 (a response rate of 35.5%, 98.2%, and 60.7%, respectively). We analyzed these data set using descriptive analysis and χ2-test through SPSS for Windows (12.0). Most question categories in Daegu metropolitan city and Gunpo city on 2005 were higher than those in the 2006 Demonstration Project regions. These were ``preparing and signing informed consent to vaccination``, ``doing physical examination before periodic immunization``, ``searching past shot history and inputting the current shot record through the immunization registry management program by physician`, ``filing a medical record``, ``satisfying the impact of 2005 and 2006 Demonstration Project and achieving the expectation of this Project``, and ``improving the immunization coverage rate``, et al. In conclusion, we show that the attitudes and practices of physician should be more sensitive to free vaccination services by private clinics and hospitals than public health centers. In the near future, the government must consider the opinion of physicians in implementing the NEPI by the affordable method of the public-private dynamics.