Background Epidural anesthesia is accustomed to clinical anesthesiologist, which is an important part of anesthesia and analgesia. Epidural anesthesia has made a great progress in its security and validity. But until now, the epidural puncture is mostly operated in blind in clinic. The anesthetic effect is estimated after drug injection or by the feeling of patients. It has no objective indication. Objective To pursue a way as epidural anesthesia revised indication, and revised the traditional way in blind. Content Since 2006, The visualization of epidural anesthesia indication has been used in above one thousand patients in clinic, which combined pressure graph with liquid reflow as monitoring indication way and have received good results. Trend This new method has been applied into clinic now. In this article, we want to establish a rigorous，specificity, safe, and reliable way in epidural anesthesia procedure, and build epidural anesthesia specification, which increase the safety and the efficacy of epidural anesthesia.