在本文中，我將仔細說明所謂「麥農主義」或「麥農式理論」的主要內容，並探討部分哲學家之所以主張麥農式理論的主要動機。在哲學史上，對麥農主義提出強烈攻擊的哲學家有羅素和蒯因等人。我將論證他們對麥農主義的攻擊其實並不具有太大的殺傷力。雖然如此，我在本文中仍然提出幾個麥農主義者必需回答的問題。我相信，這些問題才是麥農式理論真正的難題所在。

I explain the main theses of the so-called “Meinongianism” or Meinongian theories in this paper, and discuss motivations of those philosophers who hold such views. In the history of philosophy, Russell and Quine are the most famous two among those foes to Meinongianism. I argue, however, that their criticisms against Meinongian theories are not harmful. Nonetheless, I try to raise some issues that I believe any Meinongian theorist has to reply; I think that these issues are the real difficulties of Meinongianism.