1. A vehicle planning support system for supporting vehicle planning by displaying vehicle models on a screen, comprising: specification value input screen display means for displaying a specification value input screen for an input of specification values including dimensions and angles in said vehicle model; 3D morphing screen display means for displaying said vehicle model as a deformable 3D-shaped 3D vehicle model based on the specification values input on said specification value input screen using a 3D morphing screen, and 2D morphing screen display means for displaying said vehicle model as a deformable 2D-shaped 2D vehicle model based on the specification values input on said specification value input screen using a 2D morphing screen.