According to analysis, there are two reasons. First, moxibustion came from the people, and the court thought that it was of humble origin and was not ashamed to use it; The second and biggest reason is that the feudal dynasty regarded the emperor as the incarnation of the dragon and regarded moxibustion as disrespect for burning his noble body, which greatly suppressed the development of moxibustion. On the contrary, in previous dynasties (Warring States, Three Kingdoms, Jin, Tang, Song and Ming), moxibustion was highly valued.