To increase the efficiency of speedy customs clearance for the outboard and inboard passengers, the Nation Immigration Agency under the Ministry of Interior has adjusted the related administrative procedures, such kind of management policies. Take the Advanced Passenger Information System (APIS) constructed in the major ports of Taiwan as an example. It requires the ship lines submit the related information of the ships and the basic information of the crewmembers to the information-processing center of the target state for advanced inspection before entry or exit. The center can judge whether there are control subjects among them by the submitted information, and further take some prevention measures in advance. This system is one of the key policies of national security in Taiwan. It is found from the literature review that although the APIS built by the National Immigration Agency has put into practice, the system performance evaluation is so rare, furthermore, the use willingness and achievement of the related practitioners and carriers can¡¦t be known. Therefore, this study takes the Technology Acceptance Model (TAM) as the main axis to develop a TAM for the APIS. Moreover, it takes the Kaohsiung Port Brigade of Nation Immigration Agency as study scope, and the freight forwarders as the study objects, to conduct investigative study and evaluation on the situation of importing the APIS technology and the factors affecting the use of that system. The purpose of this study is to realize the effectiveness of the system implementation and subsequent improvement directions, as well as provide suggestions on how to carry out the system in the future. The study shows that the APIS effectiveness can help to increase the users¡¦ positive attitude, but the attitude towards the system can¡¦t effectively improve the users¡¦ positive intention, the information security awareness needs to be strengthened, the behavior control can¡¦t effectively increase the users¡¦ positive intention, and the persons who are in charge of the related fields show low willingness of using the APIS. Besides, the practitioners that have been founded for a longer time and developed into a large scale show a higher recognition degree to that system, and the education level also affects the willingness of using the APIS. The follow-up studies suggest reviewing the APIS promotion plan and making some improvements for it. Moreover, the involved institutions should provide assistance in the improvement of the human resource structure, make some related incentive, and enhance the information security concept, as well as conduct policy study, so as to facilitate the improvement and smooth implementation of the system.