This study aimed to make plans for knowledge management for educational quality assurance together with activity plans for work development of the department in the divisions of faculty of education, to examine conditional factors of success. Findings were: 1) The model of KM development in QA consisted of these 6 states: (1) team/core-leader preparation, (2) building motivations and participatory working, (3) making the plans and developing team potentials, (4) putting the plans into practice and developing work, (5) follow-up and upgrading the body of knowledge, and (6) evaluation for conclusions. 2) In developing and trying out the KM model for QA, the following were found. The KM model as a whole was appropriate at the highest level. Groups of people, community of practice (CoPs) operated KM according to the 6 aspects of the learning process. Sources of Knowledge were from problems, raising questions concerning development including building knowledge, classifying knowledge, storing knowledge, implementing knowledge, sharing knowledge, and assessing knowledge. The Faculty of Education had a KM center responsible for all this process. 3) The factors of success in KM for QA of Faculty of Education were: the use of leadership of the researcher, participants, and administer.