Ozone is a natural substance that exists on the earth and is well known for the existence of the ozone layer in the atmosphere. Ozone is a strong oxidant and broad-spectrum efficient bactericide with a unique fishy smell. In 1785, when the Germans were using an electric motor, they discovered that a peculiar smell was produced when the electric motor discharged. In 1840, German scientist Schonbein identified the odor as O3 and named it OZONE. Since then, European scientists have taken the lead in studying the characteristics and functions of ozone. After discovering its broad-spectrum sterilization effect, they began to apply it in industrial production. Among them, a Swedish beef company used ozone to preserve the freshness of beef storage. Since 1870, it has been Still in use today. In the 19th century, people recognized the strong oxidizing effect of ozone and found that ozone has an oxidizing effect on wood, straw, starch, plant pigments, natural rubber, fats, animal and vegetable oils, alcohol and other substances. In 1868, de Gebeth obtained the first patent for ozone application technology, using ozone to oxidize coal tar mixture into products suitable for coatings and paints. In 1873, Europe put ozone into use in sugar refining and flax bleaching. For more than 100 years, ozone applications have penetrated into many fields and made significant contributions to the development of human production technology. Ozone applications are divided into four fields according to their uses: water quality treatment, chemical oxidation, food processing and preservation, and medical treatment. Application research and equipment development in each field have reached a very high level. The world has formed an independent ozone technology industry and sector. The International Ozone Association (IOA) established in 1973 is located in Canada. The association holds an international conference every two years to exchange papers and reports on the development of ozone technology in various countries. Developed countries have generally established IOA regional organizations to conduct academic exchanges. After World War II, ozone application technology has made great progress internationally. First of all, in 1902, Paderborn, Germany built the first large-scale water plant that used ozone to treat water quality, pioneering ozone water treatment. Now there are thousands of ozone water plants in the world in Europe, America, Japan, Canada, etc. The application of ozone in the country's water plants has reached a widespread level. Almost all mineral water and purified water manufacturers are equipped with ozone equipment. The United States began to use ozone to treat domestic sewage in the early 1970s, mainly for sterilization, removal of pollutants, decolorization, etc. to meet emission standards. Japan treats sewage with ozone and uses it as reclaimed water in water-scarce areas. The United States, Japan, Germany, France and other countries have all established large-scale ozone sewage treatment plants in recent years. Secondly, industrial application of ozone has also become very common, mainly used in chemical, petroleum, papermaking, textile, pharmaceutical, and spice industries. The application in the food industry has become more popular. In 1904, ozone was used in Europe to preserve milk, meat products, cheese, protein and other foods. In the late 1930s, 80% of refrigerated egg warehouses in the United States were equipped with ozone generators. After World War II, Europe, the United States, and Japan applied ozone to all aspects of storage, manufacturing, and transportation in the preservation of food, fruits, and vegetables. In terms of medical treatment, Japan used ozone for human physical therapy during World War II, and Russia used strong gas (ozonated air) for sports applications. At present, there are many uses in the medical field internationally: such as air disinfection in wards and operating rooms, the use of ozone water for disinfection of medical instruments, the use of ozone for dental disease treatment (oral surgery and maintaining oral sterility), the use of ozone and radiation Physiotherapy is combined to treat cancer, drinking ozone water treats women's diseases, and injecting ozone gas treats fistulas, hemorrhoids, varicose veins, etc. In terms of health care, it is popular in Japan and Taiwan to inhale strong air (air containing low concentrations of ozone) to strengthen the body, and use ozonated water to shower the body to kill bacteria and beautify the body. The popular high-tech beauty treatment is actually the application of ozone. Ozone disinfection technology is a new sanitary disinfection technology introduced into the food processing industry in recent years. As people's understanding of it continues to deepen, it has gradually been used in more and more applications. The sterilization characteristics of ozone gas and ozone water give them the advantage of replacing current ultraviolet and chemical disinfection methods in certain food production links. It can also solve the problem that certain foods cannot be sterilized by heat, while reducing energy consumption.