Abstract: By means of TOVS data in 2000, the structure of several tropical cyclones (TC) is studied. The result shows that they may be different from the typical concept model of TC structure. On the horizontal level, the asymmetric structure of TC is various. The low-value center of the low-level height (or the high-value center of the upper-level height) may not be overlaid with the high-value center of the temperature. In the vertical, the configuration of the height departure is also vary. Especially, the height departure center may be slantwise vertically, or doesn't exist in the upper level, and the TC locates just at the margin of upper-level high pressure area.According to the TC structure in TOVS data, the TC bogus model in numerical weather prediction (NWP) system is modified. This helps TC bogus adapt to the environment, and improve the forecast of TC track. It is suggested that the structure of TC bogus model have great effect on the TC prediction. On the other hand, this shows us that the using of TOYS data can enhance the ability of TC prediction by improving the TC BOGUS model.