洗錢作為非法所得的行為，其過程涉及多個不同的國家及地區。犯罪分子利用國際關係、法律制度及政治原因等因素，往往能夠有效阻止對犯罪行為的偵查，從而助長犯罪集團的惡性。由於兩岸四地人員及資金往來頻繁，犯罪集團亦就四地不同法制及政治原因進行洗錢活動，筆者就兩岸四地如何有效共同打擊洗錢活動進行分析。

As illicitly acquired inevitable stage of money laundering and the process of money laundering involving a number of different countries and regions, and international relations, criminal elements using the national legal system and political reasons favorable factors, and effectively prevent the investigation of criminal origin, thus exacerbating vicious crime syndicates. The two sides of the Strait, Hong Kong and Macau have the same culture, as well as personnel and funds have been frequent, and criminal organization are also use four different legal system and political reasons and continue their money laundering activities. This article will explore how to effectively and jointly combat money laundering.