A surgical angulation measurement instrument of the instant invention includes a positioning measurer and a positioning reader linked to the positioning measurer. The positioning measurer detachably couples with a tool which is used to implant the pedicle screw. In response to the orientation of the tool, the orientation of the pedicle screw is measured by the positioning measurer with respect to a pedicle axis of screw placement. The positioning reader indicates the orientation of the pedicle screw and notifies the orientation of the pedicle screw being aligned with the pedicle axis of screw placement.
