Before the site of Dosan Seodang is selected, Toegye himself selected his living places several times, and lived there. This means that he had a intention to select more proper site to live in. The course of constructing Dosan Seodang is shown well in Dosanseodangyeonggeongisa by Geum Nan-Su, Dosanjabyeong byeonggi by Toegye, Toegyeganyeonpyo by Kwon O-Bong. The site of Dosan Seodang was selected by Toegye himself, after he himself went to the site several times at the request of his disciples including Geum Eung-Hun. He was much contented with getting the site. And through the several channels including the design drawing like Oksadoja, he was involved actively in the structure and arrangement of the building. He was much concerned in the constructing process. The location of Dosan Seodang described in Dosanjabyeong byeonggi is compared with the requirements for selecting site of Lee Jung-Hwan. It is found out that the location of Dosan Seodang corresponds much with the requirements for selecting site. The arrangement of Dosan Seowon including Dosan Seodang is examined with the arrangement of Sosu Seowon. Dosan Seodang is located, and then Dosan Seowon is constructed after Toegye's death. Dosan Seowon is a Yangtaek(陽宅) building with priority given to a lecture hall honoring the Toegye's will to assert studies on books. On the other hand, Sosu Seowon is an Eumtaek(陰宅) building with a priority given to Samyo(祠廟) in which the studying function is added after Munsungongmyo(文成公廟) is built to have a memorial service for An Hyang. The two Seowons have a contrary characteristic in their arrangements. In other words, Dosan Seowon sets the Dosan Seodang, a symbolic place of Toegye as a standard place, and then each buildings are arranged in the principle of left-high ? right-low and heigh place-high ? low place-low. On the contrary, Sosu Sewon focused on the memorial service, and then every buildings in Sosu Sewon show an arrangement of right-high ? left-low and front-high ? rear-low of the Munsungongmyo placed in the center. It is found out that Seowon can be classified into an Eumtaek one with a priority given to Sadang(祠堂) which stresses the function of memorial service and a Yangtaek one with a priority given to a lecture hall which stresses the function of studying the books, and also the difference of their function has an evident characteristic. The whole arrangement of Dosan Seowon including Dosan Seodang shows a Jangpunguk(藏風局) arrangement in which other buildings enfold Dosan Seodang which is Yangtaek and the nucleus owing to the symbolicity of Toegye. And the arrangement of Sosu Seowon shows the enfolding of other buildings for the Munsunggong's tomb, placed in the center, by making them have a role of Jangpung and Jwacheongnyong(左 靑龍).