Hemisphere ONU is a very cleverly structured optical network unit, characterized by: including a bowl shaped bottom box, the ONU module area is one-third of the bowl shaped bottom box, installed in the bottom box cavity, and the entire bowl shaped bottom box is installed on the top of the hemisphere camera, forming an integral whole with the hemisphere camera; The input power line (DC12V) supplies power to the hemispherical camera and hemispherical ONU through the power branch line; The fiber optic connection of the hemispherical ONU can be introduced through micro tube cables or through fiber optic cables. The product can be used in conjunction with mainstream OLT manufacturers and has good compatibility.