1. A multi-point spectral system, comprising: a multiwavelength filter (MWF) including a plurality of narrow-bandpass filter (NBPF) units arranged in an array, each of the plurality of NBPF units having a respective predetermined central transmitted wavelength; an imaging lens provided to form a plurality of duplicated images of a scene onto the plurality of NBPF units, respectively; and an image capturing module including a color-image sensing element, wherein the color-image sensing element has an image-sensing region divided into a plurality of image-sensing areas corresponding to the plurality of NBPF units, respectively, and each of the plurality of image-sensing areas includes plural color micro-units arranged in an array; wherein the MWF is located between the imaging lens and the image capturing module, and the image capturing module captures the plurality of duplicated images of the scene.