Abstract: In order to realize automatic marking of hot rolled steel coil, a marking workstation control system based on PLC and industrial robot is designed. The core of the control system is composed of ABB industrial robot and Siemens PLC. The hardware and software of the workstation control system are optimized through the combination of the two. Field test results show that the system workstation can complete the automatic marking work of hot plate coil, the system as a whole runs stably, in good condition, high marking efficiency, can realize the automatic marking of hot plate coil, and meet the requirements of field production.