Abstract: Based on the idea of modular structure of distributed system and a CAN field bus network, the general structure of the working process intelligent monitoring and controlling system for a combine harvester was constructed, and system integration of a cleaning loss and attachment loss monitoring device, a working load monitoring and adjustment device, a mechanical system fault monitoring device, a hydraulic system fault monitoring device and a electrical system fault monitoring device of the combine was implemented. And an integrated displaying and processing terminal (IDPT) was designed based on XScaleTM PXA270 microprocessor. Working parameters of all the devices were set on the IDPT, and working status parameters of the combine measured by all the devices were displayed, alarmed and stored by the IDPT. Field experiment results show that the system works well in the field environment, and can realize reliably the integration and fusion of the working status information of the combine.