近來智慧型手機通訊軟體崛起，新興科技所能承載的非語言訊息較過去多，其社會臨場感，以及從中產生的愉悅感是否異於其他虛擬環境，值得關注。本研究旨在探討使用即時通訊軟體的社會臨場感與愉悅感，經由文獻探討，建構出社會臨場感四大構面（共存感程度、情緒表達程度、達意程度、凝聚力程度），以及愉悅感三大構面（涉入程度、正面情緒程度、需求與滿意程度）。以網路與實體方式發放問卷，共回收312份有效問卷。整體而言，社會臨場感的四個構面與愉悅感的三個構面有高度相關。進一步探究，發現共存感、情緒表達程度與愉悅感的三構面有相對較高的關聯性。智慧型手機通訊軟體使用者，由於長時間互動與頻繁參與，跨越了中介傳播媒介的存在，讓彼此之間有如面對面之感受；而透過非語言符號的傳播，有助於營造親臨現場的交流情形，更加容易表達與感受彼此的情緒，拉進人際距離。除了社會臨場感與愉悅感整體有高度正相關之外，社會臨場感中凝聚力程度與愉悅感中涉入程度，具中度正相關。亦即，彼此關係的緊密，與投入智慧型手機通訊軟體使用的程度有相關。

The purpose of this study is to explore users' social presence and enjoyment on instant messenger of mobile phone application. To fulfill the purpose, a questionnaire was issued, 312 effective questionnaires were finally collected. The collected data were analyzed by statistical methods, such as descriptive statistics, Pearson's correlation coefficient, and canonical correlation. The findings of this study are shown as follows: (a) There is a significant relationship between social presence of co-presence, emotional expression, mutual understanding, group cohesion and enjoyment of engagement, positive affect; and (b) There is a significant relationship between social presence of group cohesion and enjoyment of engagement.