There is no useful diagnostic technique to measure the shock wave for the target asymmetry in early implosion without extra processing to black cavity and target during the study of laser inertial confinement fusion. The two-axis velocity interferometer system for any reflector was developed based on Shenguang-III prototype laser facility and the experimental results were introduced. Velocity history of shock wave in equatorial and polar of target was obtained by installing small mirror in the target. According to the reflectivity of the material and the influence by the X ray, it is determined that Al is the suitable material for the mirror at present. The difference between the plane shock loading and spherical shock loading was compared. It is found that the accurate for target equipment is the main reason for fewer signals. The diagnostic technique of two-axis velocity interferometer system for any reflector was explored through the experiment, which would give a reference to develop the two-axis velocity interferometer system or multi-axis velocity interferometer system.