A multifunctional underground irrigation system comprises of an underground irrigation, fertilization and respiration (UIFR) device with three types of air/pressure releasing structures, an universal unique label and label reader, three irrigation monitoring indicators, various sample collecting channels and measurement devices, a movable monitoring device, a water supply system, and a data center. The water containers, water drip controlling device, water flow rate controlling device, AAB device and AWPAE devices constitute the irrigation device for field plants or potted plants culture. The combination of the wireless technologies with various sensors in one of three indicators enables the underground irrigation to be visible, hearable, viewable and remotely controllable at real time and real-location manner for precision management of plant cultivation. The movable device provides a way to monitor the water supply system and to calibrate data obtained from UIFR devices. All devices in the system are repairable and replaceable.
