In view of the problem that the power supply of receiver, transmitter and servo system of CINRAD/CA of the new generation weather radar cannot be controlled remotely at present, a new weather radar remote control system based on PLC is established and implemented. Based on the Siemens S71200 PLC controller, the system indirectly controls the main circuit AC contactor by controlling the relay switch without changing the original structure of the radar, and without affecting the radar performance and technical indicators, to realize the realtime monitoring of the power supply operation state of the radar room receiver, transmitter and servo system, as well as the automatic control of the remote onekey switch. While ensuring the timeliness and availability of radar observation data transmission, the efficiency of radar technology support personnel for radar maintenance is improved, which can provide a reliable technical means for the unattended operation of the new generation weather radar observation stations.