The purpose of the investigation is measurement of a diffusing surface, normal to a certain reference plane, changing rapidly with time. In this paper are, in the first place, described basic study, based on geometrical optics, of Moire topography using an incoherent or a coherent light source in two procesess. The contents are below; (1) generating the best quality of equispacing fringes on the surface, (2) formation of Moire contour lines and height difference between the most adjacent lines. Next is shown a time resolved Moire topography consisting of casting fringe system using Xe-flash as a light source and a high speed framing camera et al, with a ten microseconds of time resolution and about 150 microns of contour sensitivity. As a typical application when a thin plate was received an impact force, the deformations of the surface are shown in a series of contour lines pictures.