Accurate irrigation data acquisition and control system and accurate irrigation system

The utility model relates to an accurate irrigation data acquisition and control system and an accurate irrigation system. The accurate irrigation data acquisition and control system comprises a monitoring unit, wherein the monitoring unit is connected with at least one field control unit in a communicating way; each field control unit comprises a multichannel data acquisition and control module, a transmission module, a soil moisture sensor, an environmental type sensor, a flowmeter and an electromagnetic valve; the multichannel data acquisition and control module is connected with the soil moisture sensor, the environmental type sensor and the flowmeter in a sampling way and connected with the electromagnetic valve in a controlling way, and the multichannel data acquisition and control module is connected with the monitoring unit through the transmission module; the environmental type sensor comprises an illumination sensor, a temperature sensor, a wind speed sensor, an air humidity sensor, an atmospheric pressure sensor and a CO2 sensor, wherein the illumination sensor is used for defecting evaporation amount; the CO2 sensor is used for monitoring the growing environmental of crop. The accurate irrigation data acquisition and control system disclosed by the utility model realizes the accurate control on irrigation by comprehensively judging multiple field factors and provides more appropriate irrigation amount for the crop growth.