During the last few years, attention in the manufacturing cycle has shifted towards concurrent engineering (CE). With this, the integration of the different product life cycle processes has become a focus in both research and industry. However, it is obvious that the integration of all manufacturing processes, taking into account all life cycle aspects from initial functional requirements to final disposal, is hardly feasible in the traditional way. In this paper, an agent based model is proposed for the automatic computer aided process planning (CAPP)integration. The autonomy, flexibility, interoperability, modularity and scalability of agent are made use of to cooperate the whole process planning and achieve the full share of resource and information. Thus,the unnecessary waste on human, time and work quantity is reduced. On the basis of the model, an agent based automatic process implementation system of CAPP is developed for demonstration in purpose.