The present invention relates an inter-enterprise collaborative process management system that manages all the processes and other computer systems of the participating companies by making all the processes and other computer systems of the participating companies interwork with each other so that various specialized companies are integrated in one virtual enterprise and the virtual enterprise is run. An inter-enterprise collaborative process management system includes: a collaborative process editor for defining, modifying and deleting a collaborative process through a user interface; a collaboration policy editor for defining, modifying and deleting a collaboration policy through a user interface; a collaborative partner selector for searching for a candidate partner of performing each activity of the collaborative process and helping selecting a most proper partner of the found candidate partners; a collaborative process agent for, when the collaborative partner is selected, performing an actual collaborative activity by using a service supplied by the selected partner; a collaborative process engine for transferring a result of the activity completed by the collaborative process agent as an input of a next activity and calling a corresponding collaborative process agent; and a collaboration agency for controlling and managing inter-enterprise collaborative activity on the basis of the collaboration policy.