Lee Jwa-hun(1753~1770) had the pen name of Yeonam. He had an extraordinary talent in writing poems as the fact that he wrote a poem when he was six years old shows. Unfortunately, he died at the age of 17. He left a book titled ≪Yeonam Yugo≫. His name appears frequently in the miscellanies of factionalists called Namin. Authors, who were deemed to be masters, took time to perform writings for him and to leave grave-stone inscriptions. The public ranked him as a great genius. He finished with his short life of 18 years while being famous for a prodigy. Researches on him have been rarely performed. In this study, a sense of sorrow had by Yeonam, who was a talented poet, was researched based on a book, ≪A Collection of Poems Written by Yeonam≫. He was a poet who showed the mysterious will of a life. The views seen by him were dreary; however, they were not all pessimistic. He expressed compassion and love for living things warmly more than any one. He died before suffering hardships and going through trials. He was unique in that he read the dark side of a life with an excellent insight rather than through many life experiences. His literary achievements were reviewed by focusing on his sense of sorrow. The results are as follows: First, he had obviously compassion and observation for human beings. He focused on the general public in his everyday life, and expressed the plain lives of people from all social positions. He observed the sufferings and difficulties of people with compassion from a very short distance. Secondly, his warm heart, which meant that sadness for the world was extended to animals and plants, is able to be felt. Maturity rather than innocence seeps through the poems of Lee Jwa-hun even if he wrote them when he was a teenager. Thus, his poems are dark and lonely rather than lively and bright. They focus on the dark side of a life rather than the bright side. Thirdly, transience that mismatched his age and that was felt during excursions to an old city can be felt as well. Through a space called Songdo, he saw the extermination of a history. From the downfall of a huge dynasty and its traces, Lee Jwa-hun realized keenly how an individual`s life was vain. There was a poet who led a short life and passed away in the latter period of the Chosun Dynasty. Fortunately, about 230 poems he wrote have remained in the form of a collection of poems. His fame as a genius and the assessment for him as a talented poet may be a praise for his extraordinary insight into aspects that cannot be seen by teenagers. I think that it is significant to restore the poems of a genius who died at a young age from the history of literature. Studies of his poems have not been performed yet in earnest. I hope that this study will lead to researches on him in a variety of aspects.