Abstract: In order to solve problems of many manual labors required, unstable production quality and low production rate because correlative parameters cannot be real-timely monitored in producing process of active carbon production of existing production lines of active carbon, the paper introduced composition, network structure and design of man-machine interface of an automatic control system of active carbon project. The system integrates producing automatic subsystems of active carbon project through industrial Ethernet and field bus technologies and realizes functions of sequential control, close-down linkage, parameter collection, real-time monitoring of key parameters and automatic adjustment of key links of whole active carbon project. The actual application verified the system's feasibility and validity.