Disclosed herein is a doping bath for fabricating an energy storage device, including: a doping bath that receives an electrolyte; a lithium foil that is provided in the doping bath; and a power supply means that supplies power to the lithium foil and at least one cell laminate provided to be sunk in the electrolyte in the doping bath, wherein the power supply means performs a charging process to supply power between a cathode and an anode of the cell laminate and a discharging process to supply power between the lithium foil and the cathode of the cell laminate to dope the anode of the cell laminate with lithium.