Lipreading plays a significant role in heating-impaired children' s language development. To do lipreading well, it is necessary to conduct lip-motion imitation training. In terms of language development, lap- reading is not a simple perceptual process, but a complex psychological process. Therefore, when lip-motion imi- tation is taken as the first step to conduct lipreading training, it is necessary to analyze the role of lip-motion imi- tation to ensure its effectiveness. This study introduces the definition and process of lip-motion imitat...