從1G、2G到3G，行動通訊技術快速發展，以往單純的語音通訊服務，逐漸演變至資料傳輸、多媒體應用，行動服務日趨多元，「內容」在行動通訊服務中所扮演的角色愈加重要。是故，電信業者無不積極發展內容相關商品。然而，這類產品的開發往往牽涉到不同領域的專業（如美工、音樂、文化創意、科技、社會、政治等），因此，吾人可以預期這些廠商勢必需要藉用大量的外部資源才能適時地推出內容商品。 在目前的行動內容服務當中，由於手機鈴聲能彰顯與眾不同的個人特色，且越來越多手機支援播放數位音樂的功能，因此，行動音樂一直以來都是最受消費者歡迎的行動加值服務，也是各家電信業者除了語音通訊之外最大的營收來源之一。然而，過去的研究重點往往著重在電信產業相關業者發展策略、關鍵成功因素等策略層面的探討，對於行動加值服務新產品開發實務歷程的研究則較少著墨。故本研究針對我國電信業者行動加值服務的「新產品發展」進行研究，以行動音樂商品為例，試圖以較為整體性的架構，探討其新產品發展之相關議題，期能對於「外部導向的產品創新管理」方面，提供一些實務上與學理上的貢獻。 本研究之研究問題有四：1.我國電信業者發展行動加值服務的策略性資源為何？2.我國電信業者在行動加值服務發展過程當中的價值網絡為何？3.我國電信業者開發行動加值服務過程中，運用內外部資源的機制為何？4.我國電信業者行動加值服務的新產品策略與開發流程為何？ 透過深度訪談電信業者，並配合相關次級資料蒐集與整理，進行彙整及分析之後，本研究獲得以下之主要結論：1.就策略性資源而言，電信業者掌握行動音樂服務之通路。2.電信業者建構之策略性資源與原有資源具有相關性。3.就新產品發展策略而言，行動音樂發展重點仍在於「強化現有行動用戶忠誠度」。4.電信業者委外動機與型態會影響其新產品發展。 / From 1G, 2G to 3G, the technology of telecommunication developed rapidly. The voice communication service gradually evolved towards the data transmission and the multimedia application and the mobile content services become much more important and diversified than before. Accordingly, tele-operators develop content products actively. However, the development of these products involves with many kinds of knowledge, such as fine art, music, programming, etc. Thus, we would expect that the enterprises have to utilize external resources to develop products timely. Because many cell phones provide functions of digital music and ring tones can show forth users’ characteristics, therefore, the mobile music becomes one of the most popular service product. However, most of the past studies focused on strategy rather than new product development. Thus, we focus on the new product development of mobile value-added services in the research. The study aims to investigate the questions: 1. What are the strategic resources for developing mobile value-added services? 2. What is the value network to develop mobile value-added services? 3. What is the mechanism of utilizing external resources in the process of new product development? 4. What are the new product strategy and process of developing mobile value-added services? The study takes mobile music as an example to explore how tele-operators can accumulate enterprise resources and better utilize external resources for developing value-added services. This study applies the deep interview method of qualitative research and secondary data analysis to study tele-operators in Taiwan. The preliminary research findings include: 1.The major marketing purpose of tele-operators’ developing mobile music is to reinforce the loyalty of existing customers. 2. What tele-operators dominate in the mobile music business is the channel. 3. The new strategic resources which the tele-operators build in the mobile music business is highly related to those existed before. 4. What motivates tele-operators to outsource will affect their ways of new product development.