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In this paper, TOVS satellite data are used through variational method on the data-sparse plateau area. Diagnoses are carried out to find a way to solve the large error problem of model initial field. It is put forward that TOVS retrieval data can be used to improve the initial field of numerical prediction model on Tibetan Plateau area. Through variational method, TOVS data are processed and the liability of the initial information on the plateau is improved. Diagnostic results confirm further that the application of TOVS retrieval data can improve our capability to describe the dynamic system features on the plateau and the objectivity of related initial information such as the distribution of water vapor channel and stratification stability.