The low energy coherent neutrino-nucleus elastic scattering is being studied in a number of experimental programs around the world. As part of TEXONO's neutrino research program at Kuo-Sheng nuclear power plant, state-of-art high purity point-contact Germanium detectors with $\mathcal{O}{(100}$~eV) threshold are utilized to study such low energy neutrino interactions at the complete coherency regime. This
work will provide an overview of current coherent neutrino-nucleus elastic scattering activities and recent results at the TEXONO experiment. We will also discuss the quantitative studies of quantum-mechanical coherency effects in coherent neutrino-nucleus elastic scattering.