The term of "gung-ahn novel", or legal-case novel, did not appear until the Southern Sung Dynasty (1127-1279 AD) and had since developed into an independent category. As a result, the "gung-ahn novel" of the Sung Dynasty is generally regarded as the earliest as well as the most representative of the kind. However, it was as early as in the Tang Dynasty (618-907 AD) that this special kind of novel actually began to grow. Considering the way literature evolves, we have every reason to incorporate Tang Dynasty's legal-case novels, which were written in classical Chinese, into the "gung-ahn novel" studies. To avoid unnecessary confusion, I defined the terms used in this thesis prior to any discussion of the legal-case novels of the Tang Dynasty. Then, the novels in discussion are categorized, according to their writing patterns, into Type A: cases involving ghosts who seek revenge; and Type B: cases cracked by careful investigation of smart and sharp police officers. An in-depth analysis will be conducted to show the particular style, structure, and spirit that are exclusive to the gung-ahn novels of the Tang Dynasty. I sincerely hope that through this thesis, the history of "gung-ahn novel" can be made more complete from the Tang, Sung, to the Yuan Dynasty (1271-1368 AD).