The off-axis three mirror anastigmatic (TMA) system has been proven a sort of excellent optical system for space-borne camera especially the compact cameras because of its high modulation transfer function (MTF) and large field-of-view (FOV). Several new methods that can be applied on the space-borne TMA system are proposed to improve its performance. Because all the improvement is realized by manipulating the pupil function indirectly, these new methods are jointly called intelligent pupil technology.