The invention provides a wireless temperature measurement sensor network for a substation. The device comprises a bottom layer temperature measurement sensor node, an upper layer routing node, a gateway and a monitoring station. The bottom layer temperature measurement sensor node sends collected data to the routing node through a bottom layer ad hoc network, and the routing node sends these data to the gateway through a ZigBee network to perform corresponding processing so as to accomplish the collection and processing of the data. The bottom layer ad hoc network adopts a SUB-G band ad hoc network protocol, the routing nodes adopt the ZigBee network, and in order to reduce the times of evasion for successfully accessing a channel by a single sensor node, the node adopts a CSMA/CA channel access mode based on a time slot division mechanism. Meanwhile, in order to find the optimal path in a ZigBee protocol network, the path optimization routing algorithm with the least packet loss rate is adopted, and the shortest path is determined by the magnitude of the packet loss rate of the total path.