A three-dimensional face acquisition system consisting of two infrared cameras and a compact speckle structure light projector is designed. The speckle projection system can be configured to project speckles according to the acquisition accuracy and efficiency. The speckle template is fixed on a gear that is perpendicular to the optical axis of the projector, and a gear mechanism is used to drive the speckle template for rotation. The speckle is illuminated by an LED with a wavelength of 735 nm to form a temporally and spatially uncorrelated speckle-encoded structured light pattern in the measurement space, and a spatial-temporal correlation stereo matching algorithm is used to achieve three-dimensional face reconstruction. Through theoretical analysis and experiments, the influence of the rotation angle of the speckle template on the measurement accuracy is verified, and the best rotation angle is determined. The German ATOS high-precision industrial three-dimensional scanner is used to obtain the three-dimensional data of the face mask and use it as the true value, while testing the three-dimensional acquisition effect of the real face. The experimental results show that when the number of projected speckles is 5, the average error of three-dimensional reconstruction is 0.063 mm, and the standard deviation of error is 0.111 mm.