This paper examines the relationship between the information systems(IS) strategy and firm performance. It discovers the relationship between each dimension of IS strategy and firm performance, that is, business action support dimension, business decision support dimension and network embeddedness support dimension all show significant positive effect on firm performance. On the other hand, it discovers the different effect of the different IS strategy dimensions working on the firm performance. That is, business action support dimension has the significant positive effect not only on the process performance but also on the outcome performance. Business decision support dimension only has the significant positive effect on the process performance but not on the outcome performance. Network embeddedness support dimension just has the significant positive effect on the outcome performance but not on the process performance.