Provided is a two-dimensional feature extraction system and a two-dimensional feature extraction method of a three-dimensional model. The two-dimensional feature extraction system and the two-dimensional feature extraction method of the three-dimensional model provide an effective aid decision making support in a searching process of the three-dimensional model based on vision. The two-dimensional feature extraction system is composed of four modules including a three-dimensional model modeling module, a visual angle vector calculation module, a three-dimensional model projection module and a three-dimensional model two-dimensional feature extraction module. The two-dimensional feature extraction method is achieved through four processes including modeling of the three-dimensional model, calculation of visual angle vectors, projection of the visual angle vector, and two-dimensional feature extraction of the two-dimensional feature extraction. The two-dimensional feature extraction system is enabled to have the advantages of being short in development period, good in maintainability and good in easy-modification performance. In addition, a user can obtain a two-dimensional projected image of the three-dimensional model by using the two-dimensional feature extraction system, and can obtain two-dimensional features of the three-dimensional model through the two-dimensional projected image, and effective system support is provided for a three-dimensional model searching system based on the vision.