The spectral range of detection band is one of the important factors affecting the on-orbit performance of optical remote sensing data. With the demand promotion of users in various fields of remote sensing application for the quality of high-resolution space optical remote sensing data in orbit, the selection of panchromatic band spectral range has become a necessary research topic for the overall design and demonstration of visible light remote sensing. In this paper, based on the analysis of the influence of different spectral range on remote sensor’s MTF, the image texture quantitative evaluation carried out on the simulation images of different spectral range by using the feature indexes such as angle second moment, entropy, contrast, and so on, and the spectral distortion analysis by the spectral angle calculation on fusion images with panchromatic simulation data of different spectral range, a spectral range setting suggestion is given: in the case of the remote sensing system MTF meeting a certain request, the wider the spectral range of panchromatic band, the better the image texture details, the more conducive to the ground object identification and further application. However, the expansion of band range will bring the degradation of system MTF in orbit, especially the more serious optical diffraction effect, which will lead to the reduction of image definition. Then the in-orbit remote sensing application will be further restricted. Therefore, if the system dynamic MTF requirement is high, considering the whole system performance in orbit, it is necessary to narrow the spectral range appropriately.