Provided is a sun tracking solar system, comprising a light focusing device and a solar energy utilization device. The system further comprises a drive mechanism (130), or further comprises a light guide device (240) and a drive mechanism (230). The drive mechanism is configured to drive a light-receiving surface to move with the sun. The light-receiving surface receives sunlight after convergence thereof by the light focusing device, and the driven light-receiving surface may be a light-receiving surface of the light energy utilization device (120), and may further be a light-receiving surface of the light guide device (240) located between the light focusing device (210) and the light energy utilization device (220). Since the driven surface is the light-receiving surface after light convergence, an area of the driven surface is usually less than an area of an original light-receiving surface. This simplifies a structure of the drive mechanism, reduces difficulty in sun tracking, energy consumption, and costs, and expands the application scope of a sun tracking solar system, or enhances the production efficiency of a sun tracking solar system.