Multispectral imaging integrated system and device and using method thereof

A multispectral imaging unit, comprising an imaging unit, a combination of feature illuminant sources, a data storage unit, a data processing unit and a display/control unit;

• wherein the combination of feature illuminant sources comprises N (N≥2) linearly independent illuminant sources within a predetermined range of test spectrum, and spectral widths of the illuminant sources are not restricted;
• wherein the combination of feature illuminant sources is calibrated on a plurality of adjacent wavebands;
• calibrated data are stored in the data storage unit;
• the imaging unit is configured to generate a plurality of images of a tested sample under illumination of different feature illuminant sources;
• and the data processing unit and the data storage unit are configured to analyze and calculate the plurality of images of the sample based on the calibrated data and associated algorithm to obtain an optical reflectance or transmittance spectral image of the sample in a specific wavelength range.