The distribution of laser energy after laser-induced optical breakdown in water is theoretically analyzed. The calculation methods for energy are given. Experimental platform is built to research energy distribution after laser-induced optical breakdown underwater. A high speed camera is used to record the procession of laser-induced optical breakdown underwater, from which the speed of shockwaves and maximum radius of bubble are got. A hydrophone is used to measure the acoustic signals in far field. The results show that 60%~90% of laser energy is converted into shock wave energy and bubble energy. The laser energy has no influence on experimental results. With the increase of laser focusing angle, the energies of shock wave and bubble both increase, and that of transmitted laser decreases.