本研究主要目的為以系統生命週期與鑽石模式為基礎探討行動商務在每一個階段採用之關鍵因素為何，並建構企業採用行動商務關鍵成功因素參考模型。本研究採用Gowin's Vee(1981)的學習概念工具，透過紮根理論整理出21項採用關鍵因素，並將此21個因素歸類至Leavitt(1964)所提出的鑽石模式四大構面。配合Sathish et al.(2004)六階段的專案生命週期模式，透過德爾菲專家問卷統計資料分析，用以建立採用行動商務初步的架構。最後進行個案研究，以驗證本研究所建立之「企業採用行動商務關鍵成功因素參考模型」之適用性。本研究有以下發現：(1)在鑽石模型的四大構面中，前十名重要的關鍵成功因素大多集中在技術與任務兩構面；(2)系統供應商和系統使用者對採用因素重要性的看法上，有5個因素在系統生命週期不同階段統計上有顯著的差異；(3)在採用因素的重要性（整體）而言以資訊廠商的支援能力最為重要，其餘依例為高階主管支持與承諾、專案小組的能力、各部門目標溝通以及任務目標的明確化。

This research aims to identify the critical successful factors of mobile commerce adoption in each stage of system life cycle, and further to build a reference model for businesses' consultation toward a successful mobile commerce adoption. We initially identified 21 critical factors based on Gowin's Vee (1981) conceptual learning framework and grounded theory method. These factors were further arranged into a model that was developed from combining the four aspects in Leavitt's (1964) diamond model and the six stages in Sathish et al's (2004) system life cycle. A Delphi questionnaire was carried out to revise the model, and a case study was finally used for verifying the model's applicability. The results led to several major findings. First, more factors from the top ten critical successful factors were categorized as technology and task aspects. Second, system providers and users had significantly diversified views on the importance of five factors scattered in different stages of system life cycle. Third, in overall, the most important factor for mobile commerce adoption is support capabilities of IT vender, and followed by the factors of senior management support and commitment, capabilities of theproject team, the communication of departments' objectives, and clear task goals accordingly. It is believed that the findings can help businesses develop an effective adoption plan on mobile commerce.