The invention discloses an illumination efficiency scoring method for an ordinary office. The method mainly comprises the following steps of counting lamp efficiency evaluating indexes, including a light source light efficiency index and a ballast efficiency index; measuring the illumination intensity and color rendering indexes by an illuminometer; calculating illumination comfort degree indexes, including three evaluation indexes of the average illumination intensity, the illumination intensity uniformity and the color rendering index; calculating the illumination operation management level, including two evaluation indexes of the lighting power density and the energy saving quantity; calculating the overall efficiency score; and calculating the overall efficiency evaluation grade of the office illumination according to the evaluation scale intervals. The illumination efficiency scoring method has the advantages that two evaluation results including the efficiency score and the efficiency grade can be output; the system efficiency level can be intuitively seen through the efficiency grade; and meanwhile, the illumination energy consumption condition and the energy saving level can be finely analyzed through the concrete efficiency score.