This study uses the storyline of Dadau Legend, a Luantan opera, as the starting point of discourse, and performs comparative analysis with related texts. We attempt to investigate all different versions of the text, and discover resonances between their "information structures", as well the significance behind each discrepancy. In this way, we aim to understand the dialectical relationship of intertextual transubstantiation that occurs in the process of text circulation. The discourse uses an information structure approach as the analytical premise. It investigates the linkage between the Luantan opera named "Dadau Legend" and a legend from Ming dynasty with the same title, as well as many related historical records, including a folktale circulating in central Taiwan titled "Liu Ding battles with Dadu Tribe". Since the "information frame" structure formed by main characters and major events (plots) possesses multiple corresponding relationships between all of the related texts for Dadau Legend, we infer that the main information framework for the Luantan opera "Dadau Legend" is based on the Ming dynasty legend "Dadau Legend" and other related historical records. The Luantan opera also takes some information from the folktale "Liu Ding battles with Dadu Tribe". We also infer the text was restructured via typical organizational logic of traditional performances, leading to the gradual establishment of the current version of the Luantan opera "Dadau Legend".