The biggest disadvantage of ozone disinfection is that it is impossible to control the concentration of ozone produced, below the safety standard there is no disinfection effect, above the standard there will be adverse reactions, such as nausea and vomiting. Ozone disinfection does not control the concentration of ozone well and is harmful to those who use it. In many families, the ozone disinfectant has been used as an air purifier, disinfection and sterilization ability is relatively strong, disinfection ability than ultraviolet light, and there is no secondary pollution, not only can the indoor air disinfection, but also able to eliminate the toxicity of the surface of the object, disinfection ability is more comprehensive. But with ozone disinfection, must be the concentration of ozone in the safe standard. If it is lower than the safety standard, there is no disinfection effect. If it is higher than the safety standard, it will have unfavorable effects on the user, which will lead to adverse reactions in the body, such as respiratory tract (e.g., coughing, sneezing, etc.), digestive tract (e.g., nausea, vomiting, etc.), and the nervous system (e.g., dizziness, headache, etc.), and so on. If any of these discomforts occur, prompt medical attention should be sought.