The application of Ethernet IO Controller in the monitoring of smart pastures, combined with existing IoT technology, cloud platform + hardware devices (Ethernet IO controller, camera, temperature and humidity sensor, etc). This program has herd management, cow identification, cow positioning, cow health condition monitoring, cow barn environment monitoring, cow precision feed feeding, manure automation processing, cow milking monitoring, etc. The set of smart pasture online monitoring system can do data analysis, processing, alarm, etc. in time, which greatly improves the automation of pasture information.