Lingshu, discusses acupuncture therapy in great detail. And there are many aspects in the book devoted to acupuncture, especially acupuncture description is rather and more organized. The book establishes the theory of meridians which explains the roots of meridians in details, and points out the location of acupoints and describes the standard of how to locates acupoints, sets forth nine kinds of needles and their uses. It lays thetheoretical foundation of Korean Medicine. This article could help improve the understanding of the blood-letting therapy in "Lingshu" and also paves the way for applying the therapy to treatment of the various diseases.