A method for measuring transverse and longitudinal inclinations of teeth includes the steps of 1, performing three-dimensional simulation model reconstruction; 2, selecting reference points, for a simulation model, drawing dental arch reference points FA and basal bone reference points AP at incisor teeth and first molars in left and right lower jaws in the simulation model, respectively; 3, establishing a coordinate system, defining a midpoint among four points FA31', AP31', FA41' and AP41' as an origin O of the coordinate system, defining a midpoint among four points FA36', AP36', FA46' and AP46' as a point Y, defining a line OY as an axis y, using a plane formed by a mesial contact point connecting to the incisor teeth in the lower jaw and mesial buccal cusps of the left and right first molars, as a plane xy, namely an occlusal plane; and 4, measuring transverse and longitudinal inclinations of teeth. The method has the advantages that observation is direct, detection is convenient and results are accurate.