The invention discloses a wireless sensing system working method based on Internet of things technology. The method comprises the following steps: an energy supply module, a data acquisition module, a data processing and storage module, and a communication module are encapsulated in a plastic shell to form a wireless sensor node; a plurality of wireless sensor nodes are placed in a monitoring area, networks are formed between the wireless sensor nodes in a self-organized mode, and the self-organized mode is multidirectional wireless connection; the communication module of each wireless sensor node is connected onto the data acquisition modules of other wireless sensor nodes through a wireless protocol; and a monitoring center is arranged in the terminal, the monitoring center comprises a fault diagnosis and alarming system , each wireless sensor node is connected with the monitoring center, digital signals acquired by each wireless sensor node are transmitted to the wireless gateway of the monitoring center via the wireless sensor system and directly fed to a computer, final analysis and processing on the data are carried out, the acquired data can be monitored in real time, and no abnormalities can be ensured to happen.