TV-Holography system is used to measure the structure vibration and to perform experimental modal aslalysis. There are several kinds of structure that are very difficult to measure their dynamic response and modals by. general experimental modal analysis methods, such as structures with relatively large damping and structures with nonlinear behavior or structures with small dimension. Especially, the aeroengine blades are twisted and have variable section area. This causes much difficult to measure the vibration modal. The TV-Holography method can overcome this difficult and has very high precision. In this paper, the basic principle of the TV-Holography is introduced. Two kinds of structures are given as examples to describe the method used in this paper.