Taking the HD virtual studio construction project of Huafeng group as an example, several problems and difficulties that need to be resolved with priority in HD virtual studio technology application are discussed in the aspects of system construction, system calibration, and weather forecast services. According to the requirements of weather television program making, six vital technical problems in the entire process of virtual studio system design and program making are solved, including the audio system delay calculation method, green box construction and lighting layout, chroma key calibration, camera positioning, tracking calibration, and meteorological data transferring and conversion. The success of this system practice is a good example to apply and popularize virtual studio technologies in weather television industry in China.