台灣於1996年頒布「都市更新條例」並於2017年頒布「危險及老舊建築物加速重建條例」因應台灣社會與經濟快速發展,建築物老化之趨勢,然實務上仍面臨地主無一致共識、誘因不足、程序複雜等多項阻礙,使許多都市更新及危老案難以順利推動。許多老舊社區因居民經濟能力有限或意願不足而延宕更新,使高風險建築仍持續使用,並在地震中造成重大損失,使推動房屋重建更為困難,過去許多地震災案例更凸顯老屋安全問題隱患。本研究將透過文獻回顧分析出阻礙因子並藉由層級分析法釐清都市更新與危老重建的影響因素,並建立層級架構,將針對有工程實務經驗 8年以上之人員發放AHP問卷,萃取出問卷結果後進行分析,盼此研究結果對未來法規修正及制度擬定提供貢獻。;Taiwan promulgated the Urban Renewal Act in 1996 and subsequently enacted the Act for Accelerating Reconstruction of Unsafe and Old Buildings in 2017 in response to rapid social and economic development and the growing trend of building aging. However, in practical implementation, numerous obstacles remain, including the lack of consensus among landowners, insufficient incentives, and complex administrative procedures. As a result, many urban renewal and hazardous old building reconstruction projects have encountered significant difficulties and have failed to proceed smoothly. Many aging communities have experienced prolonged delays in renewal due to residents’ limited financial capacity or insufficient willingness to participate, leading to the continued use of high-risk buildings. Such conditions have resulted in severe losses during earthquakes and have further complicated efforts to promote housing reconstruction. Past earthquake disaster cases have clearly highlighted the latent safety risks associated with aging buildings. This study aims to identify the obstructing factors affecting urban renewal and hazardous old building reconstruction through a comprehensive literature review. Furthermore, the Analytic Hierarchy Process (AHP) is employed to clarify and evaluate the influencing factors of both urban renewal and hazardous old building reconstruction by establishing a hierarchical structure. AHP questionnaires will be distributed to professionals with more than eight years of practical engineering experience. After extracting and analyzing the questionnaire results, this study expects to provide meaningful contributions to future regulatory amendments and institutional policy formulation.