In this paper, a remote glue supply monitoring system for cigarette processing was designed. The monitoring system was composed of host computer and field controller, and serial communication was established by PC/PPI cable. The field controller includes Siemens S7-200 PLC, digital DC output expansion module EM222 and analog DC input expansion module EM231. The host computer used KingView software to edit the monitoring software. According to the actual processing equipment, I/O distribution of field controller, design of electrical control circuit and programming of ladder diagram control program were carried out, meanwhile the monitoring screen, real-time report screen, historical report screen and alarm event screen of the monitoring software were edited. The experimental results showed that the designed control system realizes the real-time monitoring of the glue level. The liquid level can be controlled automatically by PLC or remotely by PC. The real-time report and historical report can be used to count the amount of glue used per time, daily and monthly. When the liquid level reaches the set upper and lower limits, the alarm screen will automatically display alarm events.