A water electrolysis device, comprising: an ion exchange membrane electrolytic cell configured to electrolyze water, comprising a second side, an ion exchange membrane, a cathode, an anode, a hydrogen output tube, and an oxygen output tube, wherein the ion exchange membrane is configured between the cathode and the anode; when the ion exchange membrane electrolytic cell electrolyzes water, the cathode generates hydrogen which is outputted via the hydrogen output tube, and the anode generates oxygen which is outputted via the oxygen output tube; and an integrated pathway module comprising: a water tank coupled to the ion exchange membrane electrolytic cell, the water tank being configured to replenish the water to the ion exchange membrane electrolytic cell, wherein the top of the water tank is higher than the top of the ion exchange membrane electrolytic cell; and a gas pathway coupled to the ion exchange membrane electrolytic cell, the gas pathway being configured to transport the hydrogen; wherein, the second side of the ion exchange membrane electrolytic cell faces the integrated pathway module, the oxygen and the hydrogen are outputted to the gas pathway from the second side, and the water is inputted to the ion exchange membrane electrolytic cell from the second side; and a gas mixing chamber receiving the hydrogen from the gas pathway, wherein the gas mixing chamber selectively generates an atomized gas to mix with the hydrogen to form a healthy gas, and the atomized gas is formed by vaporizing water, solution, volatile essential oil, or any combination thereof. an ion exchange membrane electrolytic cell configured to electrolyze water, comprising a second side, an ion exchange membrane, a cathode, an anode, a hydrogen output tube, and an oxygen output tube, wherein the ion exchange membrane is configured between the cathode and the anode; when the ion exchange membrane electrolytic cell electrolyzes water, the cathode generates hydrogen which is outputted via the hydrogen output tube, and the anode generates oxygen which is outputted via the oxygen output tube; and an integrated pathway module comprising: a water tank coupled to the ion exchange membrane electrolytic cell, the water tank being configured to replenish the water to the ion exchange membrane electrolytic cell, wherein the top of the water tank is higher than the top of the ion exchange membrane electrolytic cell; and a gas pathway coupled to the ion exchange membrane electrolytic cell, the gas pathway being configured to transport the hydrogen; wherein, the second side of the ion exchange membrane electrolytic cell faces the integrated pathway module, the oxygen and the hydrogen are outputted to the gas pathway from the second side, and the water is inputted to the ion exchange membrane electrolytic cell from the second side; and a gas mixing chamber receiving the hydrogen from the gas pathway, wherein the gas mixing chamber selectively generates an atomized gas to mix with the hydrogen to form a healthy gas, and the atomized gas is formed by vaporizing water, solution, volatile essential oil, or any combination thereof. a water tank coupled to the ion exchange membrane electrolytic cell, the water tank being configured to replenish the water to the ion exchange membrane electrolytic cell, wherein the top of the water tank is higher than the top of the ion exchange membrane electrolytic cell; and a gas pathway coupled to the ion exchange membrane electrolytic cell, the gas pathway being configured to transport the hydrogen; wherein, the second side of the ion exchange membrane electrolytic cell faces the integrated pathway module, the oxygen and the hydrogen are outputted to the gas pathway from the second side, and the water is inputted to the ion exchange membrane electrolytic cell from the second side; and a gas mixing chamber receiving the hydrogen from the gas pathway, wherein the gas mixing chamber selectively generates an atomized gas to mix with the hydrogen to form a healthy gas, and the atomized gas is formed by vaporizing water, solution, volatile essential oil, or any combination thereof.