A successful HRIS not only can smooth the HRM activitivies, but even aid the managers to make the decision on human resources. Besides the complete plan is necessary for establishing a successful HRIS, the understanding of the determinants for successful HRIS is even more important. This problem shows particularly significant for those companys which intend to computerize or have even computerized. After a comprehensive literature review, this study constructs an integrated model including 5 groups of variable which are the determinants for the HRIS success. Moreover, this study submits some research hypotheses for the basis of empircial study. To understand the practical conditions, finally, this study conducts an the empirical study for the selected top 5 industries in Taiwan to verify the 23 hypotheses. There are following major findings by statistical analysis: 1. System related variables group is the most important for determining the HRIS success. Among those variables, six variables--ease of use, usefulness, on-line, documentation, in-house training and user involvement--are significantly correlated with user satisfaction; however, three variables--number of applications, user involvement and self-trained--are significantly correlated with system usage. 2. Among the organizational characteristics variables, only the computer experience of firm is significantly correlated with both user satisfaction and system usage. 3. The individual/task characteristics group has modest correlation with system usage, but has only weak correlation with user satisfaction. 4. There is no significant correlation between the user satisfaction and system usage. 5. There is a significant difference among the different industries on the system usage, but has no significant difference among the different industries on the user satisfaction.