六十年前，马歇尔·麦克卢汉的《理解媒介》以“媒介即讯息”的论断颠覆大众认知。六十年来，麦克卢汉其人其书其言大起大落，但无论是褒是贬，始终是媒介研究所不能绕开的。在数智交往已成趋势，从互联网平台到社交平台再到镜像平台的全新情势下，反思“媒介即讯息”，重究“人的延伸”，再理解《理解媒介》，对于推动我国媒介学研究、构建自主知识体系具有积极意义。为此，《探索与争鸣》编辑部与浙江大学数字沟通研究中心、复旦大学信息与传播研究中心于 2024 年 9月 20—22 日在杭州举办“数字沟通”杭州对话会，会议主题为“‘媒介即讯息’：六十年后再思《理解媒介》”。与会学者围绕《理解媒介》讨论麦克卢汉的研究及其观点，“媒介”及媒介学研究对各学科学术研究的具体意义，以及如何立足中国的经验性场域，在麦克卢汉基础上打开新的空间和想象。现将部分专家观点与现场讨论整理刊发，以飨读者。

Sixty years ago, Marshall McLuhan’s “Understanding Media” revolutionized public perception with the assertion that “the medium is the message”. Over the past six decades, McLuhan and his book, ideas have experienced ups and downs, but regardless of praise or criticism, they have remained indispensable in media studies. In the emerging trend of digital-intelligence interaction, amidst the new landscape transitioning from internet platforms to social platforms, and further to mirror platforms, reflecting on “the medium is the message”, re-examining “extensions of man”, and reinterpreting “Understanding Media” hold positive significance for advancing media studies in China and constructing an independent knowledge system. To this end, we organized the “Digital Communication” Hangzhou Dialogue, focusing on McLuhan’s research and viewpoints in “Understanding Media”, the specific significance of “media” and media studies for academic research across disciplines, and how to open up new spaces and imaginations based on McLuhan’s work while grounded in China’s empirical context. This article compiles and publishes selected expert viewpoints and on-site discussions for the readers’ benefit.