《易經》設卦分爻，與《詩》、《書》、《左傳》、《論語》等書之形式迥然有別，故有若干極重要之義理，蘊藏在《易》卦式式結構之中。此種內在規律及其義理，主要反映在「卦序」及「占辭」之安排上。《易經》作者透過此種特殊的形式結構，以表達其天道觀、社會觀與人生觀。本文從「卦序系統」之角度結合《易》卦之「吉凶觀」。文末附有六十四卦三百八十四爻占辭表，以供參閱。

　　　　　The I-ching is divided into 64 diagrams, each o which consists of 6 strokes. Such a formal structure is very different from that of any other book. As a result, the implications of I-ching are discernible from its words, sentence structure, and the rich arrangement of the hexagram order and divination interpretation. Through such a special formal structure, the author expresses views of the heavenly way, society and life. This paper analyzes these implications and is appended with 64 diagrams and 384 strokes for reference.