This study aimed at determining the structural relationships among instructional quality factors of system,
service·operational, interface, and content qualities, learning satisfaction, and academic achievement in
distance lifelong learning centers authorized by the Korean government. A survey of 315 students who had
completed a semester-long distance courses was conducted. Based on the results of structural equation
modeling, it was found that the system and content qualities affected the learning satisfaction and the
service·operational and interface qualities did not. Regarding the academic achievement, the effects of the
service·operational and content qualities were significant but those of the system and interface were not.
The learning satisfaction was not found to influence the academic achievements. Finally, the
service·operational and interface qualities were found to have an effect on the academic achievement
mediated by the learning satisfaction. The result of this study will contribute to the more effective and
satisfactory educational outcome in future.