1. A virtual microscope system for capturing a stained sample to estimate a spectrum, comprising: an image obtaining unit for obtaining a stained sample image of one or more bands in one observation field of the stained sample; a spectrum obtaining unit for obtaining a spectrum at one or more predetermined portions in the observation field of the stained sample image; an optical path setting unit for setting an optical path of a light flux passed through the stained sample, with respect to the image obtaining unit and the spectrum obtaining unit by splitting the optical path of a light flux passed through the stained sample; and a control unit for controlling, until obtaining images for each of a plurality of required observation fields of the stained sample, wherein each of the plurality of observation fields are at different spatial locations of the stained sample as compared to each other, to repeat obtaining the spectrum of the stained sample image by the spectrum obtaining unit each time the stained sample image is obtained by the image obtaining unit so that generating a virtual slide image with patched multiband images in the plurality of required observation fields of the stained sample and a spectrum table containing at least the spectrum and a pixel value.