When an ultrasound is irradiated to a liquid, bubbles are formed via nucleation. These bubbles experience growth under negative acoustic pressures, and contraction and implosion under positive acoustic pressure. At the moment of implosion, laser-like is emitted and this phenomenon is called sonoluminescence. Right before the light emission, temperature of several thousands to tens of thousands is usually attained inside the bubble. When only bubble is involved, it is called single-bubble sonoluminescence(SBSL) and multi-bubble sonoluminescence(MBSL) when many bubbles are involved. The mechanism of sonoluminescence has been considered as black body radiation, or bremsstrahlung, or bound-state emission but is still to be resolved. The intensity of the SL light and the bubble stability are believed to depend on gas properties, solvent properties, etc. In this article, effects of surfactants were examined. It has been observed that the cationic surfactant OTAC(octadecyltrimethylammonium chloride) contributed positively to the intensity.