In this paper, we propose a conceptual framework of collaborative conversation activities and discuss its application in an implementation of a case study groupware system. The model is an abstraction of real conversation activity and is the basis for implementation of the computer based groupware information systems. Though this research is just in its infancy, we find that it is possible to be used for describing relatively complex group activities-the behavior and the relationships of the members in a conversation．With the guidance of the framework，a system engineer ean represent the structure of the conversation and can implement the real system in short period using powerful system developing too1．