在民國七十六年十一月二日政府正式開放大陸探親後，兩岸人民往來逐漸頻繁，隨著兩岸人民的交流，對一群隨國民政府來臺的老榮民而言，此再回故鄉距離國民政府撤退大陸已經近四十餘年。兩岸從一九七０年代末期以來，在經濟與社會各方面交流日趨密切與頻繁，在開放探親後，雖屬同文同種，但在兩岸間文化、生活、語言上之差異，兩岸通婚人數逐年增加，從以往的偷渡犯罪，漸變為合法入境而產生另一種犯罪模式的轉變，所衍生各種犯罪問題亦日趨增加，其對國內安全議題影響亦逐漸擴大。 當前影響國家安全之因素，主要有國際環境、兩岸關係與國內形勢等三個面向，除傳統性安全的武力威脅外，許多非傳統性威脅亦逐漸增加，例如：大陸地區人民偷渡來臺、假結婚真賣淫、人口販運、毒品、走私、兩岸組織犯罪、傳染病等問題，均實值得做深入探討與研究，這些問題均對國內社會環境造成變化，增加維持社會治安與社會秩序的內政成本。 全球化的趨勢，在不影響國家安全的前提下，建構兩岸合作打擊犯罪之機制，實刻不容緩，臺灣應儘速尋求兩岸合作之可行模式，本文共分為幾部分，先經由政府對大陸政策實施迄今與執行層面做檢視與探討為出發點，並輔以對探親、結婚及近來討論開放觀光等議題和相關法令做全盤、統整性之分析。再來就相關犯罪所衍生之問題，在移民機關及警察機關間之協調聯繫和在執法上遇到之困境做分析，最後，本研究就合法來臺之大陸人民犯罪問題為研究主軸，並就相關問題提出個人之看法與建議，希能提供就國家安全機制上更完整之參考。 / The Republic of China launched an open policy for people to go abroad to China and visit with their relatives on November 2, 1987, thus the relationship between cross-straits becomes closer and closer since then. To those veterans who followed the Kuomintang government’s move to Taiwan in 1949, it has been almost 40-year- separation for them to make a return voyage. Moreover, since the end of 1970s, the interactions between Taiwan and China have become closer and more frequent in all aspects of economics and society. After the said policy, although the cultural, living, and language difference still exists, the numbers of intermarriage mountain up year by year. As a result, the crime pattern has gradually changed from previous illegal immigration to legal entering but crime enhancing. The crime pattern transformation derives more and more homeland security problems. Nowadays, the factors of influence upon homeland security are mainly related to international environment, cross-strait relationship and domestic situation. Except China’s traditional threat of force to Taiwan, gradually, much other kinds of untraditional threat arise, such as human smuggling, prostitution under the disguise of marriage, drug trafficking, cross-strait organization crime, infectious diseases and etc. Not only do the aforementioned issues influence local social environment but also increase the cost both of social security and public order. Under the trend of globalization, accordingly, there is an eager need for Taiwan to establish possible crime-fighting corporate system with China without influencing Taiwan’s homeland security. The purpose of this study is three-fold. First, based on Taiwan’s “China policy”, this study examines and reviews the policy implementation and effects, then further discusses and analyzes comprehensive issues and related regulations, like relatives visiting, intermarriage, and opening Taiwan to mainland tourism which topic has recently been discussed enthusiastically. Second, aiming at criminal derivatives, this study discusses the difficult situation for said policy communication and implementation between the Competent Authority of immigration, National Immigration Agency and Police Department when dealing with related crime. Finally, focusing on the crime issues of people who enter Taiwan legally from China, this study tends to launch a policy suggestion for reference as setting up a well-designed homeland security system.