Three-dimensionally ordered macroporous (3DOM) inorganic oxides, SiO2 and TiO2, have been synthesized by combining template-assisted colloidal method with sol-gel technique. Close-packed PS beads were first prepared as template by using gravitational sedimentation, followed by infiltration with corresponding so] precursors rather than corresponding alkoxides, and then templates were removed by calcination. The morphology and crystalloid structure of samples were investigated by SEM and XRD, respectively. The results indicate that the structures of samples are well-inverse replicas of PS template and the method is also applicable to the preparation of other oxides.