Human recognition-behavioral adaptation system, which corresponds to the physical adaptation system, maintains homeostasis of Human Intelligence, the recognition-behavioral Self and the recognition-behavioral World. The recognition-behavioral adaptation system was studied in the various research fields, however, it was not clearly integrated. Structuralism provides a qualitative research method to analyze the underlying structural patterns of human recognition-behavioral adaptation in the humanities. Systems theory provides a quantitative research method to analyze performance of meta-systems consisting of interrelated and interdependent single-systems in the biological sciences. In the present study, the adaptation system was analyzed via the multidisciplinary scientific procedure integrating the qualitative research method and the quantitative research method. The adaptation system of Human Intelligence was considered to be the language-metabolism system utilizing the single-modeling-codes and the meta-modeling-codes which are formed in Neuronal Network of the brain. The Self is structured corresponding to the complex-network meta-modeling-code and the centroid-hierarchy meta-modeling-code, and it involves the cybernetic feedback system in the structure. The Intelligence-module, the core of the Self, works corresponding to the syllogistic meta-modeling-code. The adaptation system of the World was considered to be the self-reference adaptation system working corresponding to the complex-network meta-modeling-code and the ascending nest-hierarchy meta-modeling-code. Reality of Psychotherapy was reductively explained with the cybernetic feedback system and the self-reference system. Finally, it was concluded that human recognition-behavioral adaptation system is reductively and holistically analyzed via the multidisciplinary scientific procedure.