Abstract: The purpose of this paper is to give an agent organization model which can describe different types of agent organizations and can reuse the existed agent organization structure of the system. By using the role, the basic organization unit, the organization unit and the team, this model can represent the commonly used agent organizations, such as the hierarchical agent organization, the matrix agent organization and the network agent organization. To guarntee the reusability of the agent organization structure, it firstly finds the task's appropriate organization structure in the existed structures of the system when it is assigned a task to generate agent organization structure.