When we want to establish the knowledge management in the organization, we have to consider about the three factors. One is the knowledge strategy function, another is knowledge support function, and the other is knowledge implement function. Besides these functions, we still need organization roles to help organization develop the knowledge management. In the organization, through communicating, sharing, interacting and learning, the tacit knowledge can be transferred to other knowledge workers; however, through refining and retrieval systematically, the explicit knowledge is able to improve the knowledge profoundly. From organizational perspective, we can see two different styles of the knowledge exchange. If the output is ¡§best practice¡¨, we can choose the hierarchy style; and if the output is ¡§experience¡¨, we can use the network style. According to different combination of the organization roles and knowledge exchange style, we are able to obtain four forms of knowledge management. No one is better or worse than another, just depending on the needs of organizations.