A light source system, an ultraviolet curing device and a curing method applicable to a display panel are provided. The light source system includes a light source assembly a housing enclosing the light source assembly and having a first face, a second face and a third face, the first face having a first window, the second face having a second window, the third face being parallel to the display panel and located between the light source assembly and the display panel, and the third face having a third window a first filter covering the first window, a second filter covering the second window and a third filter covering the third window and a first reflecting element and a second reflecting element disposed outside the housing.
