Through mining and collecting the compiling thought of Miraculous Pivot (《灵枢》) and Plain Questions (《素问》), which were handed down from ancient times, it is discovered that these two ancient works refer to two components of one integrity book. With regard to the character and relationship, Miraculous Pivot is the main section and the essence, focusing on theoretic innovation. "Writing" is predominated in its statement. Plain Questions is the supplementary opinions to the main section, containing clinical application and material collection. "Compiling" is predominated in its statement. Both of two works were completed between the late Western Han Dynasty and the Eastern Han Dynasty. The author was a leading scholar and had worked in a national library for a long time. Before the Song Dynasty, Plain Questions had been widely circulated, while the spreading of Miraculous Pivot was limited. In the process of inheritance, some of the content of these two works were lost or supplemented, and the chapters were disarranged or adjusted artificially. But, in general, the original is not distorted seriously, especially the essential section, Miraculous Pivot.