Manufacturing system has very complex devices such as motors, cylinders and sensors. It has main purpose that produce many and good quality productions. There is an increasing trend towards higher product variety, smaller lot sizes and shorter lead times. For this trend, cloud computing, a new technical trend, was applied (We call the cloud manufacturing system). However, it lacked the research in cloud manufacturing system that is to prevent attack from anonymity. In this research, we propose CMMI security model for cloud manufacturing system' network. In order to make this model, we consider each step for security process and module in the cloud manufacturing