Human trafficking isn¡¦t single type of criminal models, but a global phenomenon except drugs and firearms smuggling, and become the third severe transnational crime. Therefore, ¡§UN Protocol to Prevent, Suppress and Punish Trafficking in Persons, Especially Women and Children¡¨ is approved in the UN. But the government began to prevent continuous descending evaluation by legislation and law enforcing until being evaluated the second grade in ¡§The 2005 US Trafficking In Persons¡¨. As it¡¦s proclaimed in Article 8 of Constitution of the Republic of China that ¡§Personal freedom shall be guaranteed to the people¡K¡¨, in Article 10 ¡¨The people shall have freedom of residence and of change of residence.¡¨ and in Article 15 ¡§The right to live, the right to work, and the right to own property shall be guaranteed to the people. the government shall stipulate associated laws to protect people¡¦s freedom to exercise the said right. Consequently, it¡¦s essential to make a research on how to formulate the legal system of the police preventing human trafficking that will ¡§prevention¡¨, ¡§prosecution¡¨, and ¡§protection¡¨. The legal system of preventing human trafficking is examined herein by the basic methods of administrative law, namely, the five major frameworks, including administrative principles, administrative organization, limitation of administrative power, administrative relief, and administrative supervision from every respect and viewpoint. Meanwhile, bibliography exploration, historical narration, comparative analysis, and generalization analysis are adopted as the principal research approaches to explore whether there¡¦s any improvement required regarding the legal system of the police preventing human trafficking on the basis of five major frameworks of administrative law. Additionally, practical implementation and suggestions for regulations and actions concerning future preventing human trafficking are hereby provided to achieve the goal of preventing human trafficking and protecting the victim¡¦s right as well.