Odor pollution is widely present in industries such as industry, agriculture, and municipal facilities, affecting the quality of public living environments. Odor pollution belongs to the category of air pollution, but compared with general toxic and harmful air pollution, it has its own characteristics. For example, foul odor is a psychological discomfort or disgust generated through human smell, and the victim does not demand a reduction in foul odor, but rather a lack of foul odor. Therefore, the prevention and control of odors is more difficult than the prevention and control of other air pollutants. This article attempts to explore some key issues in odor pollution control from the perspective of olfactory threshold.