《日下舊聞考》一書具有重要的學術價值,但長期以來學界對這部文獻本身,尤其是其纂修過程的研究卻相當薄弱。本文首先討論有關此書早期纂修工作的若干問題,進而就其成書增修、刊刻時間及著録卷數歧異等問題進行考辨。更值得注意的是,此書尚有一部罕爲人知的四庫稿本保存至今,不僅有助於我們深入了解其纂修過程,也爲研究四庫館官修史書所涉及的編纂問題提供了一個難得的範本。 However, the study of the literature itself, especially its compilation process, has long been scarce. This article first discusses some of the issues related to the early compilation of the book, and then examines the issues such as the revision of the book, the time of publication, and the number of recorded volumes. What is more noteworthy is that this book still has a little-known Siku script preserved so far, which not only helps us to understand its compilation process in depth, but also provides us with a study on the compilation issues involved in the official history books of the Siku Pavilion A rare model.