The present invention discloses an intelligent public transformer device for an electronic sand table. The device comprises a public transformer coupled to an external power grid, and an intelligent terminal coupled to an external electronic sand table system. The public transformer is coupled to the intelligent terminal. The intelligent terminal comprises a tag, an RFID reader-writer, a control circuit and an Ethernet circuit. According to the technical scheme of the intelligent public transformer device for the electronic sand table, due to the arrangement of the tag and the RFID reader-writer, the maintenance personnel can be effectively identified. Due to the arrangement of the control circuit and the Ethernet circuit, the information of the maintenance personnel can be in effective communication with the external electronic sand table system. Therefore, the maintenance work of the maintenance personnel can be effectively recorded.