A remotely controlled energy saving combustion control system is developed in this paper. The system includes three parts: upper computer, communication program between upper and lower computer, lower computer control program. Friendly human-machine interface is designed by Labview, which realizes the remote control of PLC; With Visual C, a standard dynamic link library is designed and debugged, by which the serial communication between PC and PLC can be realized; According to the scheme of air-fuel ratio, the control programs are achieved by PLC, which realizes energy saving combustion. The results of experiment in PLC experimental platform shows that the PC can effectively control the PLC .The scheme of air-fuel ratio is similar with the actual situation.