Abstract: An apparatus for the production of sterilized and calcium-ion water includes: a housing structure; an electrolytic cell with electrical terminals and electrodes installed in the housing structure; a plurality of electromagnetic valves separately provided at a water-intake pipe and a water-drain pipe in communication with the electrolytic cell; a setting switch disposed in the housing structure and electrically coupled with the electrolytic cell for adjusting the current intensity of electrolysis therewith; a hydraulic-pressure switch provided at a water pressure pipe for the control of the water-level in the electrolytic cell; an ultraviolet sterilizing tank connected to the electrolytic cell for sterilizing the electrolyzed water; and a control circuit respectively coupled with the electrolytic cell, the electromagnetic valves and the setting and hydraulic switches; whereby, calcium-ion water can be effectively produced for drinking purposes.