The knowledge management has become a major challenge for organizations "(Peter Drucker, 1993). So, Knowledge Management (KM) is often regarded as a new field, with the influence of the work of Nonaka and Takeuchi Japan it was developed. The success of KM is mainly due to the investment of the individual and their rational interest to participate in a collective process that may seem a form of knowledge of renunciation. Such an approach can be implemented in a climate of mutual trust. Therefore, organizations are struggling to survive and competitor. One of the strategies employed in these organizations is the knowledge management (KM) with support from the Knowledge Management System (KMS). Therefore, our problem is controversial since an overview of the recent literature in management, allows us to notice a lack of research and studies on knowledge management systems, which is the major source of competitive advantage.