AI anchors emerging after the introduction of AI technology to the field of news communication have combined such roles as journalists and news anchors and become the “spokespersons” for digital information communication. This paper explores the technological evolution path of AI anchors that has realized or is now realizing the externalization, typification and personalization of newsrooms based on the three technical dimensions of text, voice and image and through three technological evolution nodes of speech-to-text conversion, intelligent voice dialogue and multimodal interaction. Based on its technical development direction, the paper takes a perspective of design, summarizes a technical construction framework with linguistic symbols as the expression form and roles and norms as the base logic. In the future social ecology of human-computer symbiosis, AI anchors will likely overtake traditional anchors, achieving breakthroughs and reshuffling in audiovisual communication paradigms, news production methods, and sender-receiver relationships. The “agent design” should receive more attention from the industry and academia as a means to domesticate intelligent technology and maintain the status of human subjectivity.