《字鑑》五卷，係元代李文仲所撰，該書本《說文》以辨正字體，依四聲及二百零六韻分部，滌除俗謬，指摘俗體之譌誤，並駁正多部字書、韻書。其中，《增修互註禮部韻略》之五十三例最多。本文即以五十三例為範疇，溯本原書，再比較諸家字書、韻書，探究李文仲所辨正之是非得失，欲藉多方書說之比較，探究該書辨正標準，以明《字鑑》價值。

“Zi Jian” has five volumes, the author is Li Wen-Zhong in Yuan Dynasty, this book distinguishes fonts according to “Shuo wen jie zi”, then according to the four tones and 206 final parts, and eradicate vulgarity, to accuse vulgarity of errors, and refuted many characters books and rhyme books. Among them, the fifty-three cases in “Zeng xiu hu zhu li bu yun lue” are the most. This article takes these fifty-three cases as the category, traces back to the original book, compares the character books and the rhyme books, discuss whether what Li Wen-Zhong did is right, compare many books, find out the standard of his analysis, let the value of his book be highlighted.