Abstract: In order to remotely monitor the instrument, adjust the beam intensity and cut off the beam quickly in exceptional cases, the ion source control system which is based on the EPICS architecture was designed by using PLC, serial device server and FPGA control board. At the same time, the EPICS IOC programs for the motor and PLC system were improved. The whole system is reliable, stable and can meet the commissioning requirement of injector Ⅱ. The beam fast cut-off time is less than 10 μs and the entire process time of cut-off beam to be completed is within 60 s.