Abstract: A new designed piezoelectricity sensor system was equipped to detect the impact pressure of collapsing cavitation bubbles induced by a spark-generated system for understanding the dynamic of collapsing bubbles on metal surface. The bubble collapsing process was described and analyzed, and the second bubble collapse theory was verified. The dynamic energy of the two stages of bubble collapse was given. More important, the impact pressure and the impulse were determined and calculated at different distances between the collapsing bubble and the metal surface, and the two characteristics were compared.