An experimental investigation of the shock wave and cavitation bubble after optical breakdown in water with Nd:YAG laser pulses was presented. The experimental investigation of the laser-induced cavitation bubble expansion and collapse was done with high-speed video. The pressure acoustic signal generated by the cavitation bubble was detected with the high-frequency measuring hydrophone. In general,the bubble characteristic generated by the laser is similar to the bubble characteristic generated by the propeller cavitation in a liquid. The laser energy affects the characters of laser-induced acoustic signal,such as signal intensity,signal appearance. The results of experiment investigation may serve for the optimization in the bubble study,applications of laser medicine,laser machining and laser-generated sound.