由於背甲數量較為稀少，再加上背甲表面多盾紋、齒縫，不似腹甲、胛骨光滑平整，卜辭釋讀顯得較為困難，因此鮮少引起學者的注意，專以此議題為研究的文章遠比腹甲、卜骨稀少。背甲刻辭數量雖然較腹甲少，但若以拼綴完整的大片背甲來看，其字數及內容重要性並不亞於腹甲。經過筆者通盤整理後，發現王卜辭背甲數量並不少，總計約有六千二百餘版。本文在分組分類的基礎下，對這一批背甲進行相關研究。 本文分為七章，第一章介紹研究背景及目的、研究方法，以及目前學界研究殷墟背甲之概況。第二章至第六章，分別針對 組、賓組、出組、何組、黃類的背甲卜辭從事相關研究。研究內容包括：背甲卜辭的分類與整理、背甲文例的歸納，以及背甲事類討論。除此之外，本文也會根據各類組所呈現的不同的內容，逐一進行細步之分析。第七章則綜合前幾章的研究成果，並提出相關結論。 / Research in tortoise shell inscription hardly drew attention to the scholars owing to the interpretation difficulties of shield lines and seams on the surface and the amount of tortoise shell is few. Comparing with the smooth surface tortoise plastron and shoulder blade, few tortoise shell studies were carried out. However, as far as the importance is concerned, the content meaning and number of words in a fully joined together tortoise shell is equivalent to tortoise plastron. After sorting out in this study, a great amount, about 6,200 pieces, of royal oracle bone inscription was discovered. This research in tortoise shell is studied under the foundation of group classification. Seven chapters are concluded in this thesis. The research background and purpose, research method and the description of current academic research in Shang Dynasty will be introduced in chapter 1. The tortoise shell inscription of Shi groups, Bin groups, Chu groups, He groups and Huang groups are researched in subsequent chapter 2 to chapter 6. The content in this research includes the classification of tortoise shell inscription, the inductive inference of the grammar of turtle carapaces inscriptions and a discussion of tortoise shell category. Besides, a detailed analysis is carried out according to the different contents for each group. Finally, the conclusion of this study was made in chapter 7 base on the former research achievements.