A hard-cover binding line automatic control system was designed after the in-depth analysis of the production process requirements. The system was composed of Delta DVPEN Ethernet module, DVP28SV PLC, and DVP10MC multiple axial motion controller. The working characteristics of DVPEN Ethernet module and DVP10MC multiple axial motion controller were introduced; their applications in Ethernet system were analyzed. Application practice proved that the system structure design is reasonable; it reduce development period and its operation is much more convenient.