With the gradual development of the manufacturing industry towards intelligence and flexibility, the collaborative work of robots and machine tools can make the entire production process more efficient and flexible. However, traditional control systems and cloud computing services are unable to meet the demands of their data interaction. This paper proposes an open edge platform service architecture for robot – machine tool manufacturing units. The proposed solution is based on real-time Linux, with ROS and LinuxCNC open-source platforms as the core, and employs EtherCAT master station communication for the robot–machine tool collaborative control system. Fast DDS is deployed in the controller and server to achieve network access for different data, and container technology is utilized to build an edge microservice environment, enabling efficient data interaction and transmission. Finally, an experimental platform was set up, and system performance tests were conducted. The experiments verified the feasibility of the proposed solution.