Provided are a mobile multispectral imaging device, a user terminal for acquiring a multispectral image, a spectral image analysis server, and a method thereof. A mobile multispectral imaging device, according to an embodiment of the present invention, is for taking spectral images for respective wavelengths by using a photographing unit of a user terminal. The mobile multispectral imaging device comprises: an optical system, positioned in a place corresponding to the photographing unit of the user terminal, which irradiates light to an object to be photographed, collects the light reflected from the object to be photographed, and transfers the light to the photographing unit; and a filter wheel, which is provided with a plurality of optical filters spaced apart from one another and positions one of the plurality of optical filters in an optical path according to rotation, wherein the plurality of optical filters filter an irradiated light in a specific wavelength.
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