The structure characteristics during the landing of Typhoon Hagupit occurred in 2008 are analyzed based on the composite reflectivity (CR) and echo top (ET) data from the products of three dimensional mosaic system (CINRAD Mosaic). The characteristics of CR and ET are discussed, and the possible causes of differences between the two network products are pointed out. The results show that the convective activities in the core area of Typhoon Hagupit declined rapidly after short enhancing when its eye areas became filled from convection during the landing period. The curves of CR and ET along with the distance away from the center of Typhoon Hagupit exhibits a single peak distribution, but the former is closer to the typhoon center, with an average peak distance of 64 km and 76 km, respectively.