Introduction: In the last ten years, Mongolia has established the foundations for the intensive development of cosmetic science. At the same time, research on medicinal plants, the main crude drugs for producing herbal cosmetic products, is being conducted on a large scale. Almost 900 species of medicinal plants grow in Mongolia. However, it is important to determine which plants are used for beauty. Aim: From the ancient medical books written by Mongolian lama medical practitioners and scientists from the end of the 17th Century to the beginning of the 20th Century, select medicinal plants used in beauty and explain. Materials and Methods: Six books on traditional Mongolian medicine, including the most famous and ancient "Bdud rtsi'i bzhi" and "Shel dkar me long" by Ishbaljir (1752), and "Man ngag rin chen 'byung gnas" by Jambal (1829), were used in this study. The source research method was used in the research. In this method, first, the authors' dates, months, days, and ancient literature are researched in chronological order from the earliest times. Then, in line with the research aim, innovative and creative ideas are compared with other original medical works. Results: To address the issue, we identified medicinal plants used in beauty from ancient medical scriptures written by Mongolian lama medical practitioners and scientists from the end of the 17th Century to the beginning of the 20th Century. The research used 40 ancient medical books of Mongolian lama medical practitioners from the end of the 17th Century to the start of the 20th Century. In particular, the classification and treatment of skin diseases were most clearly presented in the books written by Luvsandanzanjantsan (1639-1704), Ishbaljir (1704-1788), Jambal (1789-1838), Jambaldorj (1792-1855), Luvsanchoinpil (19th Century), and Jigmeddanzanjamts (19th Century). Medicinal plants and ingredients for treating facial skin diseases were determined from each book collected. However, some ancient books did not contain relevant herbal or medicinal ingredients. Conclusion: Six books on herbs and medicinal ingredients used in beauty were selected. The authors of these books are briefly identified one by one with their birth dates, and then the Latin and English names of the plants used in beauty are determined. The names of the books are written in Wylie, a transliteration of Tibetan. We selected 16 medicinal plants and 7 animal-oriented medicines used in beauty and explained them from 6 ancient medical books written by Mongolian lamas, medical practitioners.