The utility model discloses a temperature and humidity monitoring system used for a transformer station. The temperature and humidity monitoring system used for the transformer station is characterized in that the temperature and humidity monitoring system used for the transformer station includes a plurality of zigbee collecting terminals, a zigbee coordinator, a GPRS network, a first GPRS module, a digital signal processor, a storage and a computer, wherein the zigbee collecting terminals are connected with the zigbee coordinator separately in a wireless manner; the zigbee coordinator is connected with the first GPRS module wirelessly through the GPRS network; and the first GPRS module, the storage and the computer are connected to the digital signal processor separately. According to the utility model, integral temperature and humidity monitoring of the transformer station is realized by utilizing zigbee technology and the temperature and humidity monitoring system used for the transformer station is simple in structure and low in cost.