The invention relates to a method for sorting dry and cool knitted underwear or shell fabrics, comprising the steps of: (1) pre-treatment according to a conventional method of the enterprise; (2) washing with water; (3) the sorting of a temperature-sensitive type micro-capsule with hydrophobic core material; and (4) post-processing with a hydrophilic agent. The underwear produced by using the method of the invention has good wet permeability and drying functions, can not only absorb the sudor perspired from the skin of a human body, but also drain the water in the clothes, thus causing the human body to be dry, cool and comfortable.