Tooth digital model attitude deviation calculation method and system, scoring method and terminal

The invention provides a tooth digital model attitude deviation calculation method and system, a scoring method and a terminal, and the calculation method comprises the steps: selecting a single tooth model in a tooth digital model, building a local coordinate system on the single tooth model, and obtaining the feature points of the single tooth model under the local coordinate system; establishing a global coordinate system according to the tooth digital model, and converting the feature points from the local coordinate system to the global coordinate system to obtain first feature points under the global coordinate system; on a dental arch curve of the tooth digital model, taking a point whose distance to the first feature point is smaller than a first threshold value as a dental arch corresponding point, and taking the tangential direction, the normal direction and the jaw plane direction of the dental arch corresponding point as three axes respectively to establish a dental arch coordinate system; calcula