  The spin chirality, created by magnetic atoms, has been comprehensively
understood to generate and control the magneto-optical effects. In comparison,
the role of the crystal chirality that relates to nonmagnetic atoms has
received much less attention. Here, we theoretically discover the crystal
chirality magneto-optical (CCMO) effects, which depend on the chirality of
crystal structures that originates from the rearrangement of nonmagnetic atoms.
We show that the CCMO effects exist in many collinear antiferromagnets, such as
RuO$_{2}$ and CoNb$_{3}$S$_{6}$, which has a local and global crystal
chirality, respectively. The key character of the CCMO effects is the sign
change if the crystal chirality reverses. The magnitudes of the CCMO spectra
can be effectively manipulated by reorienting the N\'eel vector with the help
of an external electric field, and the spectral integrals are found to be
proportional to magnetocrystalline anisotropy energy.
