Carbon dioxide is the ultimate by-product if all processes involving oxidation of carbon compounds and its increasing presence in the atmosphere since the beginning of the Industrial Revolution has given rise to widespread conceal about possible consequences (the so called "Green house effect"). Therefore, the electrochemical reduction of carbon dioxide has attracted considerable attention in recent years. In this paper, the electrochemical reduction of carbon dioxide to hydrocarbons (methane etc.) and alcohols were packed bed electrode reactor with copper particle of continuous flow under 20℃, 1atm. In order to investigate the influence of flow rate, the electrochemical reduction of carbon dioxide in packed bed electrode reactor were experimented with various potential conditions. The products of carbon dioxide reduction were analyzed by G.C. Maximum mol rate of methane were 4.71×10^-4mol/hr at -1.3V vs. SCE of 300ml/nin. Where mol rate of the ethylene were lower 20 times than methane. Maximum faradaic efficiency H₂ was observed in 200ml/min flow rate. But faradaic efficiency of the methane were presented a tendency to inverse.