为了澄清麦克卢汉所提出的空间形态，并获得对麦克卢汉媒介思想的新理解，本文重新梳理了声觉空间与视觉空间的形成过程。首先，将麦克卢汉对空间问题的关注追溯至其青年阶段所进行的文学环境研究。同时还指出在英尼斯等人的影响之下，麦克卢汉以一种全新的方式来研究空间问题，并提出了声觉空间与视觉空间，还逐步衍生出其它空间形态。直至暮年，他还坚持对上述空间进行细分和完善，并试图探寻它们的作用机制和演变规律，最终实现了对媒介的理解。此外，本文又进一步阐述了其媒介思想所依赖的知识传统，并指出其源于中世纪三学科中的语法所延续发展而来的知识传统。因此，声觉空间与视觉空间是基于经验类比而形成的隐喻概念。

This article is based on a study of the development process of Acoustic Space and Visual Space in order to clarify the spatial morphology, which is proposed by McLuhan, as well as refreshes the understanding of McLuhan’s media thoughts. McLuhan’s interest on space was triggered by his early study on literary environment. With the influence of Innis et al, McLuhan took a new approach toward space in putting forward the Acoustic Space and Visual Space, from which other spatial morphology derive. He insisted on subdividing and refining above-mentioned spaces until his twilight of life for the sake of exploring the mechanism and evolution. This article elucidates the knowledge tradition, on which media thoughts rely, was rooted in the grammar tradition that implied by the medieval trivium. Thus, both Acoustic Space and Visual Space are metaphorical concepts based on the analogies of experience.