The invention relates to an electrolysis device, an electrolysis method and a washing device having the electrolysis device. Particularly, the invention relates to an electrolysis device, which comprises an electrolytic cell, a pair of porous electrodes arranged in the electrolytic cell and a membrane component arranged between the pair of electrodes. One of the pair of porous electrodes serves as an anode and the other one serves as a cathode. The membrane component has a bipolar membrane unit and at least one positive ion exchange membrane. One side of the bipolar membrane unit is provided with a positive ion exchange layer and the other side of the bipolar membrane unit is provided with a negative ion exchange layer. The positive ion exchange membrane is arranged between the negative ion exchange layer of the bipolar membrane unit and the anode. And an alkali chamber is arranged between the bipolar membrane unit and the positive ion exchange membrane.