Under-screen camera system and operating method thereof

The invention provides an under-screen camera system and an operating method thereof. The operating method of the under-screen camera system includes: providing raw data by a pixel array; generating color information according to the plurality of color filters and the original data; generating first narrowband information according to a plurality of first narrowband filters and the original data, wherein the spectral line width of the first narrowband filters is between 5 nanometers and 70 nanometers; reconstructing edge information according to one of a plurality of diffraction patterns and the first narrowband information, wherein the diffraction patterns are provided by a database unit of a point spread function; and combining the edge information and the color information to obtain an image. The combination of the first model unit, the first narrow-band optical filter and the database unit of the point spread function can solve the diffraction problem, so that an image with higher resolution is obtained,