The invention belongs to electrolysis water generating device field. It has an electrolysis groove, which is connected to direct current power circuit, power controllable switch and sampling circuit in series, the power controllable switch is controlled by the microchip control circuit; the microchip control circuit detects the output signal of the sampling resistance through a sampling circuit. The invention uses microchip to realize the water quality detection in real-time, it upgrades the accuracy of the water quality detection, ensures the quality of water, the detection can be achieved only needing to put on a sampling resistance in the control circuit, the process is simple, easy to be realized, and the cost is low.