Physical properties of metal nanoparticle superlattices are dependent on the particle size, interparticle spacing, superlattice periodicity and symmetry, among which the control of superlattice symmetry is most difficult to achieve. Various symmetric superlattices of ligand-protected metal nanoparticles, including 2-fold chain, 3-fold quasi-honeycomb, 4-fold square, 6-fold hexagonal and network structures, can be fabricated through interligand interactions and by template methods. The electronic and magnetic properties of 6-fold hexagonal superlattices of metal nanoparticles for the future nanodevice applications are also presented.