Information systems play a critical role for the modernization of enterprise. The good quality of information is dependent on a well-established Data Administration (DA) function. The purpose of this study is to create a comprehensive DA research model. Two detail case studies are conducted in this article. Five factors (include: Environmental, Organizational, Top Management, MIS, End User Department factor) which have direct or indirect impact on DA and IQ (Information Quality) are explored and analyzed respectively. Then a comprehensive DA research model and three group of hypotheses are also suggested.