In Taiwan, breast cancer is the first cancer in women's incidence and the fourth cancer in death rate. The lung is one of the organs that are prone to breast cancer metastasis. This medical case focuses on the metastasis of breast cancer to the lung. The "vocal cord paralysis" caused by the compression of the "recurrent laryngeal nerve" is the core of the discussion of TCM interventional treatment. This medical case is treated with acupuncture and medicine in traditional Chinese medicine, so as to alleviate the symptoms. It fully proves the curative effect of traditional Chinese medicine and can make up for the bottleneck of western medicine treatment.