The Study on the constitutional composition of the formative factor for cognition and thought process in the cognition of man in the Yin Yang twenty-five type man of the Young Chu makes up the deficiency of economic-social factor begining with the influence of environment. The constitutional composition of the formative factor for cognition and thought process in the cognition of man the Yin Yang twenty-five type man of the Young Chu are interpretated the Yin type man -preponderance characteristic. The Chinese social delineation in the Yin Yang twenty-five type man of the Young possess the characteristic of the Yin type man - preponderance.