Through the analysis of join method of communication between I/O signals of PMC FANUC0iTD CNC turning machine control system and industrial robots, modified or increased the FANUC0iTD PMC CNC lathe control system I/O signals, the robot control system is used for CNC lathe FANUC0iTD system I/O signals online communication. The control and management were unified by the industrial robot control system, and many kinds of batch production of automation production line of flexible manufacturing cell (FMC) were composed. The FMC can realize automatic updown material by the industrial robot, and automatic production and processing by the CNC lathe.