2008年7月政府開放第一類大陸人民來臺觀光， 復於2011年6月開放陸客來臺個人旅遊，霎時大陸旅客蜂湧來臺，然持續擴大開放政策之同時，陸客利用觀光來臺涉犯諸如竊盜、詐欺、賣淫等違法案件所在多有，不禁令人擔憂後遺症是否浮現？ 本文研究目的，即在分析政府開放陸客第一類來臺觀光以來，對臺灣治安有哪些影響，並探討其因應對策。文中採用文獻分析法、深入訪談法及次級資料分析法等，並援引「非法移民」、「理性選擇」、「跨境犯罪」等理論，探究該政策實施迄今對我社會治安影響為何？及分析各治安機關執行陸客來臺觀光審核、管理與查緝之問題與瓶頸？ 經研究發現，政府開放陸客第一類來臺觀光以來，衍生之治安現象如下：(1)先脫團、後犯案模式轉變；(2)審核不嚴方便『合法入境掩護非法活動』行為；(3)人蛇集團仲介色情賣淫及跨境重大竊盜案、詐騙犯罪問題；(4)違法模式隨政策持續改變。另執行安全管理問題如下：(1)法令受政策影響，有欠通盤考量；(2)陸客人流審核管理現隱憂；(3)安全與經濟、人權呈現拉扯；(4)法制不同影響打擊犯罪合作；(5)審核人力、專業性不足；(6)旅行社業務轉讓，危機意識欠缺；(7)電信犯罪偵查困境仍待突破。 經歸納後提出以下建議：(1)法律制定作長期性考量；(2)設置兩岸官方辦事處，強化源頭管理、促進打擊犯罪；(3)卡式入境許可證結合悠遊卡、電子錢包促銷觀光；(4)兩岸防治跨境犯罪相關規定法制化；(5)檢討移民署組織人力與需求；(6)加強查察旅行社違規接待或轉讓業務；(7)強化治安實務交流與訓練，建構兩岸犯罪資料庫。 / In July 2008, Taiwanese government passed a legislation allowing tour groups from Mainland China to travel into Taiwan. In June 2011, Taiwanese government first allowed travelers from Mainland China on an individual basis and soon generated tremendous numbers of Chinese tourists in Taiwan. Nevertheless, when the opening policy for individual tourists from Mainland China increased substantially, illegal activities such as larceny, fraudulence, prostitution and so on emerged at the same time. It’s worrying that Chinese tourists may have had negative impacts on Taiwan. The aim of this paper is to analyze the impacts on the public security in Taiwan and countermeasures since legislation allowing tour groups from Mainland China to travel to Taiwan. In this paper, research methods (such as literature review, in-depth interview and secondary data analysis) are applied to investigate the impacts of the opening policy for Chinese tourists on the public security in Taiwan. Theories about “illegal immigrants,” “rational choice theory,” “transnational crime,” and so on are cited. The research found that the following negative influences on public security brought by allowing tour groups from Mainland China to travel into Taiwan: (1) tourists from Mainland China leaving the tour group first and using the different modus operandi to do illegal activities, (2) lenient examination on tourists from Mainland China leading to illegal activities covered by legal immigration, (3) criminal behaviors (e.g. trans-border larceny, prostitution, fraudulence, etc.) being conducted by people smuggling syndicates, (4) illegal activities appearing in different forms when the policy change happens. The following are problems of execution of safety control: (1) enactment of laws and orders being influenced by policies, not taking all things into consideration. (2) potential problems with the examination on tourists from Mainland China. (3) dilemma of choosing economy booting, safety control, or human right protection. (4) different legal systems influencing the cooperation of crime-fighting. (5) lack of manpower and insufficient professionalism. (6) travel agencies being lack of the awareness of crisis when transferring business. (7) the plight of the investigation on telephone fraud. Here are some suggestions inducted to solve the problems: (1) enacting the laws and orders with the long-run consideration. (2) establishing the official cross-strait office to enhance safety control and crime-fighting cooperation. (3) combining EasyCard and Visa Cash with entry permit to boost tourism. (4) enacting relating laws to prevent trans-border illegal activities. (5) reviewing the lack of manpower of National Immigration Agency. (6) enhancing the examination on travel agencies to check whether they accept tourists or convey business illegally or not. (7) intensifying the training courses of crime-fighting for police officers, sharing the practical experiences, and setting criminal databases.