Drugs to the meridian method: to treat the disease of internal organs to determine the attribution to the meridian, the natural properties of drugs to determine the attribution to the meridian, according to the metabolic distribution of active ingredients in the drug, and so on. 1. To determine the categorization of the internal organs of the treated disease: such as the treatment of cough, asthma and other lung diseases into the lung meridian, the treatment of spermatorrhea, gonorrhea (increased urination, dripping astringent pain) and other renal diseases into the kidney meridian. 2. Determine the meridians by the natural properties of the drugs: for example, determine the meridians of the drugs by the five flavors corresponding to the five organs, the sour flavor into the liver meridian, the bitter flavor into the heart meridian, the sweet flavor into the spleen meridian, the pungent flavor into the lung meridian, the salty flavor into the kidney meridian, to the five colors, the five qi with the five organs, or to determine the meridians of the drugs by their shapes, textures, lifting and lowering and sinking properties. 3. According to the metabolic distribution of the active ingredients of the drug: the distribution of the active ingredients of the Chinese medicine in the organs of the body through pharmacokinetic observation to determine the attribution of the drug to the meridian. 4. Other: according to the migration of trace elements in the body to determine the categorization, according to the active ingredients of the drug in the body to determine the receptor categorization and so on.