“The problems of other mind” is a hot and difficult point in the field of ”cognitive science“. “Interaction theory” from the perspective of “enactive cognition” is expected to integrate the traditional theories of “the problems of other mind” to form a unified platform in the field of social cognition. Firstly, this paper answers the background of cognitive science of “interaction theory” for seeking the meaning of “enactive cognition” as a new turn of cognitive science for “the problems of other mind”, specifically, this part introduces the theory of “enactive cognition”. As a science that studies the mysteries of human mind, the ultimate inquiry of cognitive science is the strong continuity thesis between Life and Mind. From the perspective of “enactive cognition”, the fundamental reason for the cognitive gap lies in the failure of the individualism assumption prevailing in the methodology of traditional cognitive science. Therefore, “enactive cognition” believes that the key step to bridge the cognitive gap is to return to the social context and identify how meaning is generated. Secondly, it answers the “interaction theory” itself for seeking how “interaction theory” solves the meaning’s generation of “the problems of other mind”, Specifically, this part investigates the concept of “intercorporeality”. “The problem of other-mind” should answer “Participatory sense making” in order to solve the meaning generated in the philosophy of mind, while the “interaction theory”stressed that the meaning of “intercorporeality” is created through “behavior matching” and “interactional synchrony” between the body and body without “mental representation”. But is “the problem of other-mind” reduced to the complex dynamic cycle of the brain, body and world itself if “interaction theory” leaves out “representation”? Finally, the paper tries to answer the limitation of “interaction theory” for seeking how the “predictive processing model” can clear out the black box of “representation” by using mathematical thinking mode, Specifically, this part establishes a “predictive processing non-representation model” of “interaction theory”. The intergenerational struggle in cognitive science is “representation wars”. In the rebellion against behaviorism, each iteration of cognitive science presuppositions that there must be a black box (representation) between perception and action. As a leading theoretical paradigm in cognitive science, recently “PP model” is considered to be helpful to quantitatively understand the core claims of "cognitive science" because there are studies have shown that the mathematical model of “PP model” can also be integrated with the “the problem of other-mind”. In the future, the combination of “enactive cognition”, “interaction theory” and “predictive processing model” may be the best combination to completely solve “the problems of other mind”, which also provide a reference for the mathematization trend of the new unified paradigm of cognitive science.