Before the birth of photographic technology, those cultural relics that had been damaged or disappeared or could not be collected for various reasons depended on Mo Tuo to enter the researcher's field of vision. And many cultural relics need to be properly stored and carefully protected, and can not be repeatedly touched. Through Mo Tuo, Researchers can not only obtain the materials needed for research, but also avoid multiple exposures to cultural relics, causing cultural relics to be contaminated or damaged. Modern photography technology is very developed, but the presentation of details is still not as intuitive and clear as Mo Tuo. Mo Tuo can carve stone, The text and patterns on ancient artifacts clearly appear on paper for researchers to use. This text mainly explains. ['Mo Tuo is superior to photography in the study of cultural relic preservation literature.', 'Researchers have a long history of using Motuo to study stone carvings and ancient artifacts.', 'Mo Tuo has important value for studying historical documents and preserving cultural relics.', 'Mo Tuo has different values for the protection of literature research in photographic technology.']