The utility model discloses a meteorological microwave radiometer system of ground based on dual -frenquency antenna, the structure is baroceptor, infrared radiometer, GPS, temperature and humidity sensor, rain sensor and links to each other with the data collection and control ware respectively, and the data collection and control ware links to each other with the computer, is each device of system through power module and supplies power, and room temperature black matrix reference source is installed in microwave radiometer, microwave radiometer form by K wave band antenna, K wave band receiver, V wave band antenna, V wave band receiver, K wave band antenna and K wave band receiver link to each other, V wave band antenna links to each other with V wave band receiver, K wave band receiver and V wave band receiver link to each other with the data collection and control ware respectively, and K wave band antenna and V wave band antenna back -to -back mounted, the rotation of the whole microwave radiometer of electric machine control. The utility model discloses a radiometer adopts the independent rotary antenna of dual -frenquency to substitute and adopts polarization aperture plate sharing plane of reflection or paraboloidal dual -frenquency antenna.