Based on a scattering laser principle of photoelectricity sounding from the target, a infrared laser is used in detecting sound wave. On the foundation of researching target specific feature and estimated scattering laser power of echo signal, the experimental equipment is designed. In experiment, a sound of modulation signal is detected from glass target in scattering infrared laser. If the distance between target and light source was 6～63 m and the reflection of laser ray is β≤±4° (an angle with the detector spool) the sound of echoic modulation signal should be heard. If β=4°～15°, the echo signal of scattering laser can be detected, but the sound cannot be heard. Experiment proves that the method of sounding sound wave using scattering laser from the target is feasible.