Hey Seungbee,
Many thanks for stopping by. You are right that architecture includes both the sciences and the humanities. I think for the most part, the knowledge is created cumulatively using class material and drawing upon experiences from unlimited sources elsewhere beyond the classroom. The lectures provide the basic building blocks of knowledge with which, then, the student is set free to explore further without much inhibition, and come back with higher level synthesized knowledge blocks that are more complex than before. And this usually begins right in the first year of study. Perhaps this is why when we see the work of those who have undergone architectural education, as you noted, we get to see a great deal of innovation in it. Of course, combining the sciences and the humanities can be a nightmare for the students as these two areas require different sets of skills and the students find themselves constantly swinging back and forth.