through the injection nozzle 21 thereby exhibiting the antibiotic and sterilization functions after a predetermined time period passes the sterilizer 100 operates in the second mode that is the cell membrane of the bacteria is subject to the electric current flowing between the two electrodes 130 and 140 so the bacteria is destroyed or disappears due to the ag ions further ag which has been emitted in the first mode and reduced through the sterilization process of the bacteria or other methods is activated into ag ions in the second mode the consumed ag ions are restored through the procedure as described above so that the operation time of the first mode can be shortened and thus the consumption amount of ag can be reduced in the first electrode in another embodiment the sterilizer 100 operates in sequence of the second mode and the first mode the reason of primarily operating the sterilizer 100 in the second mode is that the ag ions emitted during the washing process may be affected by the high density detergent dissolved in the washing water and other ions and the sterilization function of the ag ions may be interrupted thus the sterilizer 100 operates in the second mode during the washing process such that the sterilization function due to the electric current between the first.