《等韻簡明指掌圖》是刊行於清乾隆時期的一部韻圖，作者張象津，從其語音系統觀之，應該是反映了當時山東桓台的方音。其聲韻調如下：聲母有十九個，顯然已完成濁音清化、唇齒音化、知莊章合流以及零聲母化等現象。韻目分為十二攝，除了m韻尾已併入n韻尾中外，入聲韻尾亦已消失，所以該圖以入聲韻配陰聲韻型態出現。聲調分為五，依次是陰平、上、去、入、陽平。本文目的在觀察此圖語音系統的特點，並取現今方音加以對當，由此除可得悉當時山東方音的面貌外，同時也可進而顯示此圖在編排體例上的保守與創新。

《等韻簡明指掌圖》(《Deng Yun Jian Min Zhi Zhang Tu》) was published at the Qian Long period of Qing Dynasty. The author Zhang Xiang Jin observeted the influenced of the Shan Dong dialect in that time. In this book, contained 19 initials、12 rhymes and 5 tones. This paper is observated the characteristics about this phonology system. In the same time, in compared with the dialect of Shan Dong for the present. Through this research, we can realize the real face of the dialect of Shan Dong in that period, at the same time, we can indicate the conservation and unprecedanted of this book.