Provided are an apparatus and method for measuring contamination of a filter. The filter contamination measuring apparatus includes a light-emitting unit which provides light having, a predetermined wavelength to a filter adsorbs foreign materials, a light-receiving unit which receives light reflected by the filter and convert reflected light information into a digital code to output, and a contamination calculating unit which processes the digital code provided by the light-receiving unit and calculates a degree of contamination of the filter, wherein the contamination calculating unit calculates a degree, in which a wavelength of the light reflected by the filter is shifted from the predetermined wavelength, compares intensity of light provided by the light-emitting unit with intensity of the light reflected by the filter, and calculates the degree of contamination of the filter.