Controlling multiple robots to work together without conflict is essential in the factories but it is difficult. The existing monitoring methods for multiple robots are not perfect because they are inconvenient to use and have poor real-time performance. To deal with these issues, this paper proposes a multi-robot monitoring system based on digital twin for simulation and collision detection of robot movements in the real environment. The overview framework of the proposed system and the

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... technologies will be introduced in this study. The designed system has the characteristics of friendly interface and convenient operation, which effectively improves the efficiency of condition monitoring and has practical significance for production monitoring. Abstract Controlling multiple robots to work together without conflict is essential in the factories but it is difficult. The existing monitoring methods for multiple robots are not perfect because they are inconvenient to use and have poor real-time performance. To deal with these issues, this paper proposes a multi-robot monitoring system based on digital twin for simulation and collision detection of robot movements in the real environment. The overview framework of the proposed system and the related technologies will be introduced in this study. The designed system has the characteristics of friendly interface and convenient operation, which effectively improves the efficiency of condition monitoring and has practical significance for production monitoring.