We know that there is an ozone layer on the Earth's atmosphere. Scientists have found that the ozone layer can absorb ultraviolet light. Studies have shown that ozone only has a ** absorption coefficient for ultraviolet light with a wavelength of 253.7 nm. At this wavelength, ultraviolet light will be attenuated by ozone, in line with Lanport- - Beer's law. This method has been used as an ozone standard analysis method by countries such as the United States. The ozone detector adopts the principle of ultraviolet absorption method, generates ultraviolet light by a stable ultraviolet light source, filters out other wavelength ultraviolet light with a light wave filter, and allows only a wavelength of 253.7 nm to pass. After passing through the sample photosensor and passing through the ozone absorption cell, the sampled photosensor is reached. By comparing the electrical signals of the sample photosensor and the sampling photosensor, and then calculating the mathematical model, the ozone concentration can be obtained.