本研究以科技接受模型為基礎，企圖整合資訊品質、系統品質和網站服務品質作為認知有用性和認知易用性的前置變項，期待了解三種品質構面對科技接受模型的影響效果，藉以探討民眾在使用電子化政府入口網時，會受到何種網站品質的影響，增加其使用意圖，以獲得對電子化治理的相關理解。另外本研究並嘗試以形成性指標的方式建構三種品質構面，以修正過去文獻誤用品質構面為反映性指標的情形。 透過線上問卷系統*蒐集1459位民眾的意見後，本文的研究結果顯示對認知易用性影響最大者為網站服務品質，認知有用性則受到認知易用性最大影響。對使用意圖有最大影響者為使用者的態度。三種品質的形成性指標對品質構面皆可達到顯著，在解釋上較為符合品質構面應為形成性指標的建構形式。文後並提供了對政府建置政府網站的實務建議，希冀能夠對未來政府網站建置提供參考。 / Based on technology acceptance model(TAM), this study develops a reaserach model that integrate information quality, system quality and website service quality as antecedents of perceived usefulness and perceived ease of use. The purpose of study is to explore how the three quality might influence technology acceptance model, and what might strengthen user intention on e-government portal website. In addition, this study develops quality constructs as “formative-indicators”rather than reflective ones to correct the misuse of some literatures. The model is then tested using a sample of 1459 users from online survey and analyzed the data using structural equation modeling. The results show that(1) website service quality(WSQ) have the most effects on ease of use(EOU), and that (2)ease of use have the most effects on usefulness(PU). They also demonstrate that (3)attitude predit user intention the most. The significance illustrate logically the relation between formative-indicators of three quality and the constructs. Implications of this study for research and practice are presented.