Water treatment device and water treatment system adopting same

The utility model relates to a water treatment device and in particular relates to a device for treating water by coupling ozone with plasma. Specifically, the device comprises a high-voltage power supply and is characterized by further comprising a first cavity which is defined by an inner-layer dielectric material and in which a high-voltage electrode of the high-voltage power supply is arranged, and a second cavity formed between an outer-layer dielectric material and the inner-layer dielectric material, wherein the second cavity is provided with an air inlet and an outlet, and the outlet is communicated to liquid to be treated; a first grounding electrode is arranged outside the inner-layer dielectric material; a second grounding electrode is arranged outside the outer-layer dielectric material. On the basis of an existing dielectric barrier discharge technology, a high-concentration ozone generation device is coupled, so that the ozone concentration is increased, the decomposition oxidation effect of ozone and the synergistic effect of ozone together with an ultraviolet effect and a high-energy electron effect are improved, the removal rate of organic matters in polluted water is increased, and the sterilization and disinfection effects of the device are enhanced.