The application of three-dimensional(3D) scanning technology in the conservation of ancient buildings and cultural heritages has become increasingly common in the past decade, and it has also played a great auxiliary role. At present, from the preservation and maintenance of some monuments, 3D scanning can be seen for recording and modeling. However, the 3D model created by simply scanning the stele's appearance has no substantial help for calligraphers who are accustomed to using flat rubbing versions of stele inscriptions to learn calligraphy. Therefore, the purpose of this study is to extract useful information for calligraphy research through 3D scanning of stele characters. At present, there is a lack of relevant research data on this topic to refer to. After the author's self-designed testing and analysis, the preliminary results obtained in two directions are extremely valuable for the research in the field of calligraphy: (1) The 3D model of the tablet obtained from 3D scanning can accurately extract the outer frame of the text surface, accurately simulate the effect of traditional tablet rubbing, and avoid errors caused by various human factors in traditional manual rubbing, such as the amount of ink used to affect the thickness of the characters, etc. (2) For the text with damaged surface, the result of traditional rubbing is a large area of ​​blank; however, the 3D model of the text obtained by 3D scanning can be pushed back and extended by using the traces of the text strokes at the bottom of the residue to restore the original appearance of the inscription when it was not damaged. The research results will be helpful for the identification of the weathered stone ancient tablets, the damaged wooden couplet plaques and the inscriptions on ancient artifacts.