To clear the dust on the lungs, there are many food therapy methods and herbal methods that can be adopted and recommended. Pears, rock sugar and shellfish boiled in water can play the role of moistening the lungs and dissolving phlegm to clear the dust on the lungs. Mulberry leaf, loquat leaf and maitake have the effect of clearing and moistening the lungs, which can also clear the dust of the lungs. Diet lotus root, yam, radish and pear boiled in water has the effect of strengthening the spleen and nourishing the lungs, moistening and nourishing the lungs, and long-term consumption can effectively remove dust from the lungs, while including animal offal, such as pig lung and cow lung stewed with radish, yam and konjac can effectively remove dust from the lungs. The protective effect of herbal and food therapy on the lungs should not be underestimated, and can be effectively given in conjunction with oxygen and other treatments.