Smoking moxa does not purify the energy field. In the theory of Chinese medicine, moxa is made into moxa sticks or cones by igniting the moxa floss and placing it on the acupoints or diseased parts for barbecuing and fumigation, with the help of warm stimulation of moxa heat and the effect of medicines, it warms up the qi and blood, supports the correctness and dispels the evils, and prevents and cures the diseases. According to the characteristics of moxibustion method, the scope of adaptation is based on cold, deficiency and yin evidence. There is no purifying energy field function.