In theory, the main tasks of the police in the government structure are to fight crime and direct traffic. However, since the ROC government moved to Taiwan in 1949, the police have played many roles outside the scope of their ordinary duties.
理論上現代警察在政府體系的分工，最重要的任務是「維持治安及交通」，但從政府遷台到現在，台灣警察仍然扮演許多「不務正業」的角色。