Abstract: Aiming at the low water utilization rate and low management efficiency of the traditional irrigation and fertilizer technology, the monitoring operation of integrated irrigation and fertilizer based on computer network technology was studied. The integrated irrigation and fertilizer was constituted of equipment module, communication module, data module, interface module and user module.The crop growth state was mainly affected by conductivity（EC） and pH value.The monitoring software of integrated irrigation and fertilizer was designed to control and adjust these two indicators.They were also controlled by fuzzy controller to ensure the growth of crop.To verify the property of integrated irrigation and fertilizer, the parameter monitoring test and simulation test were conducted.The test results show that the monitoring accuracy of the system is high, the control result is well. It could meet the requirement of the farmers.