社會網絡服務(SNS)對現今世界上成千上萬的人而言，已是生活的一部份。自從SNS於1990年代後期推出後，這些服務已改變了人們溝通與互動的方式。使用者透過SNS與朋友們分享他們的經驗、照片、及聊天；政治人物與他們的選民分享不同的觀點；藝術家與其粉絲溝通互動；更多人利用它來經營事業或交朋友。 不僅如此，SNS對企業的活動亦造成不少的衝擊，本研究即在探討它們對企業的活動（特別是服務業）的影響。一些問題如：哪些企業活動被影響？如何影響？SNS會為企業帶來哪些利益？SNS對企業會造成哪些風險？不同的服務業是否在SNS上享有不同的利益？將是本研究所要去加以深入探討的。最近的一些學術性與管理實務上的期刊及書籍正給與本研究去回答這些問題的基礎。透過大量的文獻、書籍及相關資料之整理與歸納，本研究的主要發現乃歸納出SNS在每一個企業功能（作業、行銷、人力資源、研發、財務等）所帶來的潛在利益與陷阱；基此，本研究亦建構了一個SNS的觀念性架構。最後，本研究提出了一些管理上的意涵及未來研究上的建議。 Social Network Services (SNS) have become a part of daily life for millions of people around the world. SNS were introduced to the world in late 90’s, these services have changed the ways in which people communicate and interact. Users share their experiences, photos and chatting with friends, politicians share their views with their audience, artists communicate with fans, and many others are using these services to boost their business or just keep up with friends. Social Network Services have also found their way to influence business activities. This study explores the shape and size of this influence. Which business activities are influenced? In what way? How can business benefit from the popularity of social network services and at the same time avoid the risk? Are there differences in the way different industries in service sector are enjoying these benefits? Recent academic and managerial articles and books under the subject of social networks had been reviewed to answer these questions. Findings highlight the benefits and the pitfalls associated with the popularity of SNS in each business activities. A conceptual framework of SNS has also been introduced. Finally, managerial implications and suggestions for future research submitted.