In this study, we analyzed the removal efficiencies of SO_x and NO_x by the pulsed corona discharge process and investigated the effect of several process variables. The NO removal efficiencies and the SO₂ removal efficiencies were measured and analyzed as the function of initial concentrations of NO, H₂O, and NH₃, SO₂, applied voltage, pulse frequency and residence time. As the frequency of applied voltage increases, or as the applied voltage increases or as the residence time increases, the NO, SO₂ removal efficiency increases. The NO, SO₂ removal efficiency increases by the addition of O₂ or H₂O, or by using the large diameter of the discharge electrode. The experimental results can be used as a basis to design the pulsed corona discharge process to remove NO_x, SO_x and VOCs.