Abstract: A single bubble trapped at the antinode of an acoustic standing wave field in water can emit 50ps~140ps light pulses. This is called "single bubble sonoluminescence"(SBSL). The parameter space of a stable SBSL is mainly determined by stable shape oscillation, diffusive equilibrium of mass, chemical equilibrium of components, and high energy focusing in its interior. Based on these four conditions, the dynamic stability of the bubble is briefly discussed in this paper.