Spectral analysis is used to present the design flow of a non-coated photopic visual illumination sensor. The sensor matching error is evaluated by calculating the relative deviation of central wavelength, full width at half maxima, and the integral area in 380-780 nm band between theoretical relative spectral response and apparent photopic visual spectral efficiency function. Using the combination of blue glass QB21, yellow glass LB9, LB16, and LXD44MQ silicon photocell, the theoretical relative spectral response of the illumination sensor is compared with the spectral efficiency function of the photopic illumination spectrum. The relative deviations of the central wavelength, full width at half maxima, and the integral area in 380-780 nm band are 0.36%, 5.00%, and 14.15%, respectively. With TES 1330A illuminometer as the standard reference, the average absolute error and relative error of 10 groups measured in the range of 0-2000 lx are 7.82 lx and 1.77%, respectively. Results show that the proposed method is feasible and can be used as a reference for the design and development of related illumination sensors.