The generation and expression of human emotions is an important part of human cognitive function. Especially the explanation of the specific mechanism and influencing factors of human high-level emotional response has always been an important subject of experimental psychology. In this research, we take the high-level emotional response of cuteness as a starting point to discuss the relationship between two closely related factors, namely, that is, the relationship between expression types and expression intensity with cuteness under two age conditions (adult vs child). According to the results of this experiment, positive expressions make people feel cuter in adults and children. In the case of negative expressions, the intensity of expression and the sense of cuteness are significantly negatively correlated regardless of adult or child. In the positive expression category, the child's expression intensity is positively correlated with the cuteness, and adults do not. No significant correlation between expression intensity and cuteness was found under the neutral expression.