It has been 20 years since the enforcement of the Police Power Exercise Act. However, when the police set up checkpoints to perform drunk driving inspection services, there are frequent disputes in practice as to how the provisions of the Police Power Exercise Act regarding the power of inspection should be applied. In addition to briefly presenting the opinions expressed by the Administrative Court on this matter, this article will also point out that the root of the problem lies in the incoherence in the normative content of Articles 6 to 8 of the Police Power Exercise Act. As a solution to the problem under the current normative system, this article believes that the focus of control over the exercise of police power should be advanced to the review of the legality of the decision to set up checkpoints. However, in order to rectify the source, we should still consider the rationality of the normative style of Article 8 of Police Power Exercise Act. In this regard, this article will also put forward suggestions for amending the law.