1. A three-dimensional data acquisition method, adapted to acquire three-dimensional (3D) data of an object, comprising: projecting a laser light onto a plurality of regions on a surface of the object so as to form a plurality of features within each of the regions; for each of the regions, capturing the object and the features from a first direction and a second direction simultaneously so as to generate a first object image corresponding to the first direction and the second object image corresponding to the second direction; for each of the regions, processing the first object image and the second object image so as to obtain two-dimensional (2D) coordinates of the features in the first object image and the second object image; and obtaining the 3D data of the object according to the 2D data of the features in the first object image and the second object image corresponding to each of the regions.