1. A display angle adjustment system, comprising: a display rotation module capable of moving a display; an image capture module rotatably positioned on the display; a data processing module electrically connected to the image capture module, for receiving a signal including image information from the image capture module, and calculating an eigenvector comprising a plurality of feature points according to the signal; a control module electrically connected to the display rotation module, the image capture module, and the data processing module, for rotating the display rotation module and the image capture module according to the eigenvector calculated by the data processing module.