Objects : This study focused on the concept of Hyolmaek in Hwangjenaegyeong Youngchu. Methods : We researched the words "Hyolmaek" through Hwangjenaegyeong Youngchu. According to meanings of Hyolmaek in sentence, we classified Hyolmaek. Results : In Hwangjenaegyeong Youngchu, the meanings of Hyolmaek(血脈)are follows. 1. There were many meanings of Hyolmaek In Hwangjenaegyeong Youngchu. 2. Hyolmaek means blood vessels, Lakmaek, blood circulation, extravasated blood, and etc. and it represents blood vessel systems.