鉴于图文交际的普遍存在,本文提出从图文模态间视角来研究英文媒介广告的机构身份是如何在图文语篇层面得以构建的,并基于系统功能语言学在词汇语法层建立一个图文实现模式,以英国周刊Broadcast中的一百篇广告为语料,研究文字符号模态如何与视觉符号模态一起共同识解媒介广告机构身份。 In view of the prevalence of graphic communication, this paper proposes how to study how the agency identity of English media advertising can be constructed from the perspective of graphic modality at the level of graphic discourse. Based on system functional linguistics, This paper explores how the symbology modality works together with the visual symbology modality to identify the identity of the media advertising agency based on a hundred advertisements in British Weekly Broadcast.