In order to improve the automation level of biomass briquetting machine production, monitor the key parameters in the production process of the briquetting machine in real time, and solve the problem of blockage in the compression chamber caused by inaccurate powder feeding rate, a set of remote monitoring system for biomass briquetting machine was designed, which realized the control of powder feeding rate through OPC communication with PLC relying on the fuzzy PID control algorithm running in the remote host computer. The 5G network was used as the remote data transmission channel, the 5G industrial router was selected as the network data transceiver, and the remote monitoring function of the client was realized through the Web page, mobile phone APP or WeChat applet. This system set up user monitoring layer, data network transmission layer and measurement and control field layer. Based on the requirements of system remote monitoring, data transmission between industrial router and PLC was realized through PROFINET protocol. The MQTT protocol was used to realize data transmission between it and the ECS. According to the tests on system stability, feeding accuracy and communication performance, when the current was stable, the average error between the actual value and the target value of the current fluctuated at the range of 1%~12%, and the variance fluctuated at 0.19%~0.28%, meeting the production needs of biomass particles and improving the intelligent level of biomass particle production.