張柬蓀作為中國近代哲學發展中的里程碑人物，這應是沒有疑問的。不過，在其思想的發展中，的確也展現出了一種階段性的轉變。尤其是在他自己思想成熟以後，也就是所謂的「多元認識論」階段，以及他向「知識社會」的轉變上，事實上隱藏著其思想在成熟過程中的奠基抉擇。這點不但牽涉到純粹的哲學理論結構在自我規定上的尋求，並且也透露出中國人在從事哲學思索上所可能及的原創深度，並揭示著我們應該採取的態度為何。不過，本文只是這一總的研究計畫中的一個小環節，旨在指出於這一思想轉折中，張柬蓀是如何地由「多元認識」過渡向他的「知識社會學」。至於更進一步有關在理論體系上的「問/論題分析」(problematic analyses)，作者則將它規剷於正在進行中的後續研究裡頭。

　　　　　As a prominent modern Chinese philosopher, Zhang Dongsun has been recognized for his original contribution in the field of epistemology. His epistemological pluralism, a knid of revised Kantianism, was fully developed in the years between 1931 and 1937. In year 1937, the year when he finished the latest formulation of epistemological pluralism, Zhang turned his attention to the sociology of knowledge. The English translation of Karl Mannheim's classical work on sociology of knowledge, the Ideology and Utopia, is not published until 1936. Zhang was immediately inspired by this book and started to construct his own theory of sociology of knowkledge. This paper examines this turning point of Zhang's thought in view of ulluminating the reception of Western Philosophy in modern China.