The success of the Enterprise 2.0 KMS (knowledge management systems) depends on the user’s continuous participation in the process of knowledge sharing. This study attempts to identify the determinants of the user’s intention to continuous knowledge sharing based on Expectation Confirmation Theory and Channel Expansion Theory. We also consider communication process modes (i.e., blog and wiki) as a moderator for perceived channel richness. The results of our analysis show the positive effects of all the predictors. With regard to the moderating effects of communication process modes, the effect of experiences shared with group members is greater in the channel to support conveyance, and the effects of experiences about the channel and the group task are greater in the channel to support convergence.