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With the development of radar technology across the world, the domestic radar has developed from conventional radar to single polarization Doppler, then double polarization Doppler, with the target information obtained being more abundant. The principles and product information of conventional radar, single polarization Doppler, and double polarization Doppler radar are introduced in detail. The performances of the next generation S , C , and X band radar are compared, which has a certain reference value for the selection of the radar wavelength. The millimeter wave Doppler radar is also introduced, which can obtain cloud structure information. The performance and trends of the next generation radar network are evaluated. The double polarization Doppler radar will be the main trend; the electronic scanning small mobile radar will also become important for its flexibility, to make up the blind spots of next generation weather radar sounding.