Investigation is a national action that conflicts with the basic rights of an individual in the course of discovering the criminal to recover the infringed public order. Indeed, until recently, as the state has focused on maintaining and restoring public order, it has been true that the human rights of individual citizens have been relatively neglected. However, it is an irreparable criminal act by the state power to punish an innocent person by illegal investigation such as torture, assault, intimidation, coercion, or confession acquired through such investigation. Based on this awareness of the danger of misjudgment, modern civilized countries are pursuing the procedural legitimacy of investigation irrespective of the type of transport structure. In particular, in order to prevent infringement of human rights during the investigation, Various measures are taken. In this context, it can be analyzed that the debate on the improvement of the investigation process, which is currently under way in Korea, is proceeding to protect human rights. Nevertheless, it is a reality that there is not a lot of negative view on whether the practice of investigation in Korea is being operated in accordance with the criminal law system or interpretation attitude and human rights guarantee. In the meantime, investigative agencies have made various efforts such as strengthening the education of human rights of investigators through the participation of lawyers and the introduction of image recording system. But the most important thing is the human rights consciousness of the investigator who is open and conforms to the investigation process that is aimed at the protection of human rights of the citizen. Since the investigation is the ultimate role in the function of public order restoration, the human rights consciousness of the investigator is directly connected with the image of the state organization in charge of public order maintenance.