Abstract: With the construction and development of intelligent grid, intelligent substation is becoming more and more popular. Due to the great difference between intelligent substation and conventional substation, especially in telecontrol transmission, the existing test equipment and technology can not effectively complete the telecontrol transmission. This paper provides a portable remote signaling and telemetry verification device, which can conveniently and efficiently realize the above functions, improve the commissioning efficiency of intelligent substation and ensure the stability and reliability of power grid operation.