An independently detachable light-emitting diode light source module adapted to be installed in a luminaire's casing having an opening and an accommodating cavity, is provided. The independently detachable light-emitting diode light source module includes an installing device, a light-emitting diode array, and a secondary optical light guide plate. The light-emitting diode array and the secondary optical light guide plate are disposed in the installing device. The light source module is disposed inside the accommodating cavity and is assembled in the luminaire's casing via the installing device, and the opening exposes the light-emitting diode light source module.