Since it declared Martial Law ended on July 15th, 1987, Cross-Strait people has communicated and interacted to each other for years, implying the increase of possibility and necessity of mutual intermarry. In light of the increasingly serious cases of illegal activities, illegal work or prostitution of people from mainland China in the name of marriage, which jeopardizes the safety of society and nation, it has implemented interview system for people who come from mainland China in the name of marriage since 2004. In order to judge whether the marriage is real or not, it makes comparisons on the mutual parties’ descriptions about the process of getting acquainted with each other or the situation of interaction for tightening control on the examination for Taiwan residence application of mainland spouse. This study aims to explore whether it has deficiency or not on the current prevention mechanism against false marriage of mainland spouse from an overall perspective. Further, it referred to relevant theories and literatures for formulating the improvement and reinforcement measure on visiting and interview mechanisms. It adopted appropriate corresponding countermeasures by means of Operational Risk Management Integration Tools to make an inductive analysis on the risk factor of failure on preventing false marriage of mainland spouse in order to take effect with its natural mechanism, promote the efficiency as well as lower the incidence of Taiwan residence application of mainland spouse due to false marriage. In conclusion, it proposed the suggestions for relevant authorities in terms of lowering risk in practical operations from three perspectives of policy, regulation and implementation.