The purpose of this article is to study thought of Kim, Jeong-Seol. His thought appeared to his book An Llegant Spirit(『風流精神』).
An Llegant Spirit(『風流精神』) was made after he died, and it was called His main text with A story of The Flower Man(『花郞外史』). This book has a different writing 4 papers. The papers are The Flower Man(?花郞?), A though of Choe, jae-woo(?崔濟愚論?), A though of Yin and Yang(?陰陽論?), Chweseong Kim si-seup ?贅世翁 金時習?). And as well as the purpose of these papres, there are different form.
However, the core of this article is ‘The Harmony(調和)’. This ‘The Harmony(調和)’ is read again in today's life history.
It is difficult to find his thought through 『An Llegant Spirit(風流精神)』. But the new approach to text is needed.