The purpose of this study is to confirm whether the fitness between the task and the centralization of information system makes a significant influence on the information system performance. The task is defined as two sub-constructs of number of the exception and the analyzability. User satisfaction was used as a surrogate variable of the performance of information system, and computer self-efficacy was used as a control variable. Field research method using questionnaires was employed to empirically investigate the relationship among the variables. Findings of the study can be summarized as follows. The fitness between the task and the centralization of information system produced a significant effect on the user satisfaction. Under highly exceptional or less analyzable task environment, high user satisfaction was achieved when the information system was less-centralized.