歷來嘅韻圖喺結構上都與此圖相仿。頂端橫欄列聲紐（聲母），左側縱欄列韻目，右側標明目次（頁碼）、轉同呼，中間圓圈同字雜錯嘅部分就係正文。正文中嘅每一格都可以根據佢嘅縱橫位置（類似數學裏嘅坐標）得出相應讀音，有字嘅，就係此字嘅讀音，亦即係對應韻書中嗰個小韻嘅讀音；畫成圓圈嘅，就係有其音但無其字。
Historically, the rhyme diagram has been similar to this diagram in structure. The top horizontal column column is the sound button (initial), the left column column rhymes, the right side indicates the order (page number), the same call, and the middle circle and the wrong part is the text. Each box in the text can be pronounced according to its vertical and horizontal position (similar to the coordinates in mathematics), and if there is a word, it is the pronunciation of the word, that is, the pronunciation of the small rhyme in the corresponding rhyme book, and if it is drawn in a circle, it has its sound but no word.