The purpose of this research are (I) to give an empirical evidence that performance expectation, effort expectation, social factors, jzt on tasks and conditions which facilitating user will affect the level of interest in usage of information system, and (2) to give an empirical evidence that interest in an usage of information system will effect a utilization of the information system. The respondents of the research are employment that using information technology system in finishing its job. Data has gathered by questionnaires and documentation. Sample total is 50 respondents. The result of research with partial regression indicated that variables of antecedent are namely performance expectation, effort expectation, and conditions which facilitating a utilization of the information system, significantly affect the interest of usage the information system, while social factors and fit to task not significantly effect on interest in usage of information system. The result of research with partial regression indicated that variable of consequence namely interest in usage of information system significantly affect utilization information system.