In this study, we analyzed the removal efficiencies of SOx and NOx by the pulsed corona discharge process and investigated the effect of several process variables. The NO removal efficiencies and the SO_2 removal efficiencies were measured and analyzed as the function of initial concentrations of NO, H_2O, and NH_3, SO_2 applied voltage, pulse frequency and residence time.As the frequency of applied voltage increases, or as the applied voltage increases or as the residence of applied voltage increases, or as the applied voltage increases or as the residence time increases, the NO, SO_2 removal efficiency increases. The NO, SO_2 removal efficiency increases by the addition of O_2 or H_2O, or by using the large diameter of the discharge. The experimental results can be used as a basis to design the pulsed corona discharge to remove NOx, SOx and VOCs.