Abstract: The application of suspendome system in China is introduced; For the real suspendome structure on site of Tianjin Museum, frequencies of different construction stages for this structure are calculated; Dynamic tests at two construction stages are carried out by Ambient Excitation Method and Hammer Exciting Method separately, test process and results are analyzed; Through modal analysis, it is concluded that the suspendome structure has such properties as high basic frequency, closely distributed modes and sound integral structural performance; By contrast, the differences in the properties of suspendome structure at two stages are studied.