In order to improve the accuracy and convenience of the procedure for orthodontic treatment, the present invention relates to a method for acquiring an oral scan image, which is obtained corresponding to an intraoral profile of a subject and each tooth image is virtually adjusted according to a predetermined consecutive dental structure, A first step of extracting one virtual wire template corresponding to the continuous dentition structure； Wherein the virtual wire template is aligned and arranged so as to correspond to one of the inner and outer surfaces of the tooth images virtually adjusted in accordance with the continuous dentition structure, and wherein the virtual wire template corresponds to one surface of each tooth image from the digital library so as to overlap with the virtual wire template A second step of extracting and arranging a plurality of virtual bracket templates to be virtual； A virtual bracket blade including a pivotal end portion corresponding to the first overlapping region in which the virtual bracket template and the virtual wire template are superposed and a passage forming portion extending from the pivotal end portion to the outer side of the virtual bracket template, Step 3； And a second overlapping area in which the passage forming part and the virtual bracket template are overlapped and the first overlapping area are erased so that the calibration wire is set on the basis of the virtual bracket template, And a fourth step in which the digital bracket including the engaging groove portion in which the opening direction is inserted and bonded is individually designed and three-dimensionally printed.치열교정을 위한 정밀성 및 시술편의성이 개선되도록, 본 발명은 피시술자의 구강 내부 프로파일에 대응하여 획득되되 각 치아이미지가 기설정된 연속치열구조에 따라 가상조절된 오랄스캔 이미지가 로딩되고, 디지털 라이브러리로부터 상기 연속치열구조에 대응되는 하나의 가상 와이어 템플릿이 추출되는 제1단계； 상기 가상 와이어 템플릿이 상기 연속치열구조에 따라 가상조절된 상기 각 치아이미지의 내외면 중 어느 일면과 대응되도록 정렬배치되되, 상기 가상 와이어 템플릿과 중첩되도록 상기 디지털 라이브러리로부터 상기 각 치아이미지의 일면과 대응하는 복수개의 가상 브라켓 템플릿이 추출되어 가상배치되는 제2단계； 상기 각 가상 브
