本研究以新聞性談話節目的「資訊」來源、內容及特色是「公共」或「娛樂」作為比較，探討兩個類型迥異的新聞性談話節目《關鍵時刻》與《2100全民開講》的製作策略、「公共」或「娛樂」內容如何展現、以及「新聞談話」在當下的意義。研究採用內容分析和深度訪談進行，發現兩個節目都在重新建構節目和觀眾的關係，並運用多元形式的製作節目。不過，偏重公共引導的節目重視議題以公共為主，以情感衝突和辯論方式帶動來賓討論公共議題；偏重娛樂導向的節目常用娛樂資訊和「腳本化」方式進行主持人與來賓的互動式表演。前者雖在公共議題討論較多，但重視情感衝突，不重視公共議題的理性思辨，往往化約議題的歸因；後者節目重視消遣、懸疑和愉悅的娛樂化資訊，節目多用個人表演「建構」社會想像。兩種節目類型均因觀眾的喜好改變，而有不同定位，為了增加有趣有吸引力的元素，不像過去一樣重視談話節目的觀眾叩應參與和民意表達，尤其傾向娛樂資訊的談話節目和公共領域已經漸去漸遠。

The initiation of news talk shows in Taiwan was ‘Speaking Your Mind at 2100’ which inclined to the commentary of politics and the discussion of public issues since 1994. The new genre of news-oriented talk shows was emerged in recent years. It is a kind of entertainment-oriented talk show in which makes fun of the day’s news; ‘This is it’ is its representative.Analysis of two programs content and in-depth interviews set points to the public forum or infotainment characteristics of news talk shows. The results suggest that ‘Speaking Your Mind on 2100’ provides informational values about public issues and news as a forum for pulling the public to criticize the government. However, news talk show like ‘This is it’ constitutes a comic significant infortainment offers more human interest in daily introspection. The results suggest thatthe differential presence of infotainment elements can be more identified in ‘This is it’. The shift from public forum to infotainment is thus a process redefining news talk show programming. The critique rests on an underlying set of values favoring Habermasian rationality and enlightenment rhetoric over an emphasis on human interest and affect.This opens a new space of the study of news talk shows.