The application discloses substation equipment temperature monitoring device and system, the device includes: the node temperature message routing that is used for obtaining temperature information that temperature sensor monitored, will corresponds with temperature information through the wireless transceiver first control ware to the host computer links to each other with temperature sensor, a power for $facing temperature sensor, first control ware and a wireless transceiver provide operating voltage. , gather the temperature information of monitoring node as temperature sensor after, with this temperature message routing to first control ware, the first control ware generates node temperature information according to the address information of temperature sensor's correspondence and by its temperature information of obtaining, through the radio signal receiving ware with node temperature message routing to the host computer that generates, visible, does not need artifical participation at whole monitoring in-process, therefore has reduced the plant maintenance cost, has improved work efficiency.