According to the physical process of flyer plates driven by magnetic fields, an ultra-high speed photographic system including an ultra-high speed rotating mirror streak camera, a micrographic lens suitable for the optical system of the camera and a continuous laser source was developed. An electric-optic switch in series was used to avoid the repetitious exposure on imaging plate of the camera, by which the intense light produced in the course of collision was bated and 1D clear-cut streak images of flyer plates driven by an electric gun were obtained firstly at home. Experimental results show that Ly12 flyer plates with the size of 8 mm×6 mm×0.7/0.9 mm can be accelerated in 9-14 km/s within 1.8 μs when the charge voltages of flyer plate reach in 60-64 kV. The results demonstrate that the charged voltages and the thicknesses of flyer plates have great effect on the movement velocities of the flyer plates. The present work will be helpful for researching flyer velocity and can provide important data for the development of electric guns.