Using CAN (controller area network) field bus and iCAN protocol, an integrated measuring and controlling system for combine harvester is constructed in this paper. ARM is used as the processor of host computer. Lower computers are several measuring and controlling modules of combine harvester. Host computer communicates with lower computers through CAN bus. Information between measurement and control modules can be shared so that combine harvester’s whole performance can be improved. LCD on host computer shows working state and values of relative parameters of each module in real-time. Experiment shows that the system can work correctly and reliably.