The present invention relates to a fingerprint sensing module suitable for being configured below a display module, and comprising a plurality of sensing elements and a signal processor. The display module projects a background beam and a marking beam to a finger pressed onto the display module. The plurality of sensing elements sense a fingerprint image generated after the background beam and the marking beam are reflected by the finger and pass through the display module. The signal processor is electrically connected to the plurality of sensing elements, and converts the fingerprint image into a corrected fingerprint image by using a corrected image. The present invention also relates to a fingerprint sensing method.