The invention discloses a wireless sensor network for a power transmission and transformation system project. The wireless sensor network comprises a sensor, a measurement transmission and transformation module, an analog-digital conversion module, a controller, a ZigBee module, an antenna module and a low-drop-out power supply, wherein the sensor, the measurement transmission and transformation module, the analog-digital conversion module, the controller, the ZigBee module and the wireless module are sequentially connected; the low-drop-out power supply is respectively connected with the sensor, the measurement transmission and transformation module, the analog-digital conversion module, the controller and the ZigBee module; the sensor is used for converting a measured physical value into a differential signal and outputting the differential signal to the measurement transmission and transformation module; the measurement transmission and transformation module is used for calibrating the differential signal, compensating the temperature change, regulating and processing the differential signal to enable the differential signal to be linearized, and outputting a standard signal; the analog-digital conversion module is used for carrying out analog-digital conversion on the standard signal and outputting a digital signal; the controller is used for transmitting the digital signal to the ZigBee module; and the ZigBee module is used for sending the digital signal out through the wireless module. The wireless sensor network is capable of measuring various signals in a power transmission and transformation system project and sending the various signals out wirelessly, and has the advantages of low power consumption and low cost.