Abstract: In the research of the early Shangqing jing(上清經)(Supreme Clarity Scriptures), Shangqing yuantong jingmu zhuxu(《上清源統經目注序》)is a very valuable literature. Comparing with Tao Hongjing's Zhengao(《真誥》), Shangqing yuantong jingmu zhuxu has given a different interpretation on the concept “Shangqing jing” . This article aims to demonstrate：(1) the author of Shangqing yuantong jingmu zhuxu should be Lu Xiujing; (2) Shangqing yuantong jingmu zhuxu provided a widespread and traditional interpretation on “Shangqing jing”, which is recognized as a part of Sandong jing(三洞經)(Three Carves Scriptures); on the contrary, Zhengao's interpretation to “Shangqing jing” has never been really accepted among the majority of Daoist groups; (3) the difference between Lu and Tao's interpretation is related to their different understandings of how to become immortals and the functions of Daoist rituals.

Key words: Shangqing yuantong jingmu zhuxu, Shangqing jing, Lu Xiujing, Tao Hongjing