Title: Neutron Physics in a Contemporary Perspective Abstract: In this talk, I will attempt to give an overview of the neutron physics in the context of nuclear physics. For decades, physicists have been performing measurements on the process of neutron beta-decay to refine the electroweak theory in the standard model. Recently, research focus in the field of fundamental neutron physics is shifting towards stringent tests of the presumed symmetries. Broken symmetries would give rise to exotic processes which could be measured in high precision experiments, without background of the standard model. Experiments of this kind include the search of the electric dipole moment of the neutron, and the neutron anti-neutron oscillation. New opportunities like these emerge with the availability of ultra-cold neutrons(UCN). I will also talk about ongoing studies on current and future UCN source.