Red-Hat Linux之CEO，Robert Yang曾對微軟行為作如此論述：「微軟很壞，但壞的很成功！」本文內容可分為三部分。首先在於釐清微軟成功之原因，針對形成微軟獨佔個人電腦作業系統之原因，做一有系統之經濟觀點分析：將軟體產業特殊之競爭策略層面考量與相關網路外部性理論經濟模型推論、驗證過程透過本文架構重新整合，發展出不同於一般管理文獻論述之方式以建立微軟獨佔地位之經濟理論基礎。第二部份針對微軟破壞競爭規範等違法行為作研究，主要針對微軟1998年對網景之反托拉斯此案，以美國司法部公布之事實認定書與休曼法為基礎，加以延申並做詳盡之探討。第三部分則針對微軟被宣判違反反托拉斯法後，政府在網際網路時代下執行反托拉斯法以回復競爭規範之角色、補救原則、措施做一探討並與AT＆T案例比較；最後並提出兩種分割方式經濟模型分析與最適分割條件之政策性建議。 / The CEO of Red-Hat Linux, Robert Yang, has made such comments on the behavior of Microsoft that:” Microsoft is very bad, but very successful.” This thesis mainly focuses on three parts. The first part is to clarify the reasons why Microsoft is so successful and analyze its monopolistic position on personal computer operating system market in light of a systematic、economic method combining strategic competitive characteristics of software industry with economic theories of network externalities, making its foundations of monopoly and distinguish from general managerial arguments through the framework of this thesis. The second part primarily focuses on the antitrust case of Microsoft’s behavior against Netscape proposed by DOJ in 1998. Basing on the DOJ’s findings of fact and the antitrust law of Sherman act, we made explorative research on the case. The third part is to explore the role、principles and methods of antitrust remedy enforcements by government under the era of networks and Internet and compare with the AT&T case in 1982. Finally, we compare between two different ways that divide Microsoft into two companies in light of economic analysis and propose policy recommendation about condition that will optimize upon exploiting such remedy method.