Since People used a lot of information technologies in different societies, no matter private enterprises or public administrations all effort to use the newly information technologies (especially in internet application), to increase the speed and correctness of dealing with information and cost down. For example in enterprise, internet changes the relation between business and business, customer and business, and the competition model between business and business. In government, public administrations used information technologies and communication to redesign the organizations, simply the processing to improve the efficiency and response citizen¡¦s demand immediately. Therefore information technologies change, deal with, disseminate the paths and speed of knowledge. The influence existed not only in enterprises, but also changing the style that government accessed and managed knowledge. Kaohsiung city government pushed the Knowledge Management System. But the rejection of members in organization has huge influence in pushing KM, on the other hand Technology Acceptance Model is a major method in discussing the behavior of information technology acceptance recently. This research reviews some literature about knowledge management, and analysis the IT and knowledge management portal in the members of Kaohsiung city administration to propose the model influence KMS acceptance for an reference base when public sectors plan and build KMS. The research surveies the employees of secretariat of Kaohsiung city government, including the amanuensis in first level administration and schools. We distributed 285 questionnaires and received 137 effective questionnaires. After using LISREL and SPSS 10.0, the foundings of this research is: 1. It is usefulness to use TAM2 to measure the acceptance of knowledge management system. It also proves the acceptance between KMS and general IT system consilient. 2. The difference of population is not signality for the behavior intension of using KMS. 3. It is also not signality between scocial norm and perceived usefulness in this research. 4. Kaohsiung city government has not enough effort in pushing KMS. It must depended on high-up to built knowledge sharing culture in the organization.and practice real knowledge management