In the context of artificial intelligence, the application of "Internet +"smart-classroom teaching environment is of great value to modern teaching practice. In education environment, teachers can control the teaching environment and adopt emotional awakening as the main penetration principle, which can effectively promote students' learning efficiency. This study is based on the ecological valence theory (EVT), Combining Thomas and Chess PTQ as well as the odor preference questionnaire, 339 Chinese children aged 3-7 were randomly selected as subjects, The results show that 1, olfactory sensitivity can be used as an important environmental science application element in the smart-classroom of children aged 3-7; 2, it can effectively improve Chinese children's mood and persistence that the intelligent ecosystem in the environment through the linkage application; 3, it contributes to the accurate dissemination of odor categories in smart classrooms that establishment of child trait big data analysis; 4, uses different sensing devices and man-machine interaction modules to effectively increase the control of the teaching space, enhance students' sense of self-efficacy.