The invention discloses an intelligent monitoring system based on wireless sensors, which includes a plurality of terminal nodes, routing nodes, coordinator nodes, irrigation equipment and a monitoring center, and the terminal nodes include a processor module, a data acquisition module, a wireless transceiver module and a power supply 1 module, routing node includes processor 2 module, data acquisition module 2, wireless transceiver module 2 and power supply module 2, coordinator node includes processor module 3, wireless transceiver module 3, serial communication module and power supply module 3, wireless transceiver module The 1 module transmits the data to the wireless transceiver 2 module and the wireless transceiver 3 module through the Zigbee network. The wireless transceiver 1 module, the wireless transceiver 2 module and the wireless transceiver 3 module are all equipped with CC2520 and CC2591. The invention can accurately grasp the natural environment parameters such as soil temperature and humidity, light intensity and rainfall, so that it is convenient to carry out remote monitoring on the growth status of crops.