A system for assisting a collaborative activity includes a plurality of work interfaces, a role management unit, a workflow management unit, a collaborative activity registration unit, and an activity context management unit situated between the plurality of work interfaces and the collaborative activity registration unit to receive entered information from one of the work interfaces, to associate shared information contained in the entered information with user information provided by the role management unit and an activity content provided by the workflow management unit to create collaborative activity information, and to cause the collaborative activity registration unit to register the collaborative activity information.