Two control methods of the column processing the plasma exhaust gas are proposed in the present study. A method is that the flow rate of the middle product stream is adjusted from the tritium balance around the column. The flow rate of bottom product stream is adjusted by a feedback control loop. In the other method, the flow rate of middle product stream is adjusted by a feedforward control loop from the tritium feed rate by the plasma exhaust gas. The flow rate of bottom product stream is adjusted by a feedback control loop. The later method always gives successful results against the appreciable fluctuations for the flow rate and composition of the plasma exhaust gas.