The receiving system, which is called the parallel filter system with the integrated multireceiver, as the most critical component of the groundbased microwave radiometer, it is necessary to examine its structure and technical characteristics. The advantage, compared with the single receiver， i.e., frequency conversion technology, is described and the actual application effectiveness of the receiving system is analyzed by means of radiation data and products. It is concluded that this receiving system can improve the detecting capability of the groundbased microwave radiometer. The findings can be used to provide reference for relevant technicians in the application and analysis of groundbased microwave radiometers.