The utility model relates to a wireless communication device for overvoltage measurement of an electric power system. The wireless communication device comprises a wireless emission bridge and a wireless receiving bridge; the wireless emission bridge is installed on an outdoor site of a transformer station, and is connected with an overvoltage signal acquisition system; and the wireless receiving bridge is installed in the transformer station, and is connected with a computer. The wireless emission bridge and the wireless receiving bridge comprise an embedded communication processor, a clock crystal oscillator circuit, a power supply and a switch, the embedded communication processor is connected with the computer through an Ethernet interface, the embedded communication processor is connected with a wireless network card through a PCMCIA interface, and the wireless network card is used for receiving or emitting voltage signals. By employing the wireless communication device for the overvoltage measurement of the electric power system, during the overvoltage measurement process of the transformer station, cables do not need to be arranged on the site, the working intensity is reduced, the working efficiency is improved, and the safety of light current equipment of the measurement system and measuring personnel is ensured.