A light source module for providing an illumination light includes a light source configured to provide a first beam of a first waveband, a microlens array disposed corresponding to the light source and configured to uniform the first beam, a first lens set configured to focus at least a portion of the first beam uniformed by the microlens array, and a wavelength conversion unit configured to convert at least a portion of the first beam focused by the first lens set into a second beam of a second waveband different from the first waveband, wherein the second beam and the first beam not converted by the wavelength conversion unit together form the illumination light.