中唐時期，由於安史之亂，以長安、洛陽為中心的貴族佛教法相宗及華嚴宗逐漸衰亡；替代成為中心的佛教，便是盛行於江西、湖南地方的南宗禪：「一花五葉」，名家輩出，影響力有日愈增高的趨勢。其中有一位不願剃度、在家修行的居士--龐蘊，終其一生都以白衣居士身分涉世，生活態度亦迥然有異常人。他不僅徹底擺脫封建官僚社會的瓜葛，也不認同僧界禪宗社會的生活，反而以自由人的形式，在「世人嫌龐老，龐老不嫌他」的表現中，將自我滿足的思想和行動表現在其禪詩中。 本文擬從禪學流變、居士佛教的興起，探討中唐時期居士禪的興盛原因，及當時社會、禪師、文人們的互動情形，以說明龐蘊對當時普世社會的影響，遠比禪宗僧眾來得大，他可以說是使禪道中國化的第一位居士。

Shann thoughts had gradually been declining in the middle period of the Tarng dynsty till Yunn Parng, who was a freethinker away from temple. He was the first man to recommend and interpret the Chinese-Shann. This paper tries to explore the causes to make yourself at home-shann as well as their stakeholders from the Thought-Shann's transition. The purpose of this paper is mainly to decompose Yunn Parng's Shann-Poem into the tangible sense.