in recent years, change has been an important issue in organizational development, Because it is an integral part of an organization to survive and develop in a complex condition. Thus, more and more organizations are seeking appropriate ways to explore and manage organizational change, so that their organizations can operate effectively. As a result, increasing demands in consultants and change agent have become more and more obvious. In this essay, some fundamental concepts in organizational change management will be involved. In the meantime, the role of the consultant in organizational change management and the merits and difficulties of consultancy approaches to change also will be discussed. Finally, some individual reactions to the role of consultants in organizational development are explained.