The present invention relates to a pedicle screw fixing planning system and method, and more particularly, to a system and method for planning the length and insertion path of a pedicle screw based on a C-arm image. The pedicle screw fixing planning system of the present invention includes a C-arm for taking an image of a patient's spine； An insertion path providing unit providing an entry point and an insertion end point of the pedicle screw on the C-arm image； A matching unit calculating spatial coordinates of the entry point and the insertion end point based on a reference coordinate system； A guide device for determining an insertion posture of the pedicle screw based on the spatial coordinates of the entry point and the insertion end point, and guiding the insertion of the probe toward the entry point according to the insertion posture； And a screw determination unit determining a length condition of a pedicle screw by obtaining coordinates of a starting point contacting the bone as the probe is inserted and calculating a distance between the coordinates of the insertion end point and the starting point. In the present invention, since the C-arm image is used in place of the existing CT image used during planning, radiation exposure of a patient can be reduced and a surgical procedure can be simplified. According to the present invention, it is possible to modify and adjust the operation plan based on the C-arm image even during surgery, and to omit image registration, thereby improving the accuracy of the review of the operation progress and navigation of the surgical tool. In addition, based on the screw guide posture used in the planning process, it can be continuously used for the procedure, so that the surgical procedure can be proceeded quickly.본 발명은 페디클 스크류 고정 플래닝 시스템 및 방법에 관한 것으로서, 더욱 상세하게는, C-arm 이미지를 기초로 페디클 스크류의 길이, 삽입 경로 등을 플래닝하는 시스템 및 방법에 관한 것이다.본 발명의 페디클 스크류 고정 플래닝 시스템은 환자의 척추 이미지를 촬영하는 C-arm； C-arm 이미지상에서 페디클 스크류의 진입점 및 삽입 끝점을 제공하는 삽입경로 제공부； 기준
