The invention provides a sensor gatherer based on a LoRa technology, for wireless connection with a concentrator assembly. The concentrator assembly comprises a concentrator and a first LoRa wireless module connected with the concentrator, the sensor gatherer comprises a processor, and a data acquisition function unit, a second LoRa wireless module and a second timer which are connected with the processor, and the first LoRa wireless module in the concentrator assembly is in wireless communication connection with the second LoRa wireless module in the sensor gatherer. The invention also provides a wireless sensor acquisition network system based on a LoRa technology and a communication method of a wireless sensor acquisition network based on a LoRa technology. According to the invention, through optimization configuration of communication nodes and time strategies, the advantages of field acquisition, low consumption and unattended operation of a sensor are realized.