Photonic crystals are substances in which particles of a certain size are aligned to reflect light of a specific wavelength. The reflected wavelength corresponds to twice the distance between particles. By controlling the particle size, the reflected wavelength can be adjusted. Colloidal photonic crystal possesses opal structure, in which inorganic nano particles can be infiltrated. So It can be fabricated into inorganic inverse opal photonic ball in two steps 1) preparation of three-dimensional composite bead of inorganic nanoparticles within interstices of polymeric opal structure. 2) calcination of polymeric opal template. As the material of inorganic particle changes, the optical properties can change. A radiative cooling effect can be expected by utilizing optical properties of photonic ball.In this study, inorganic inverse opal photonic balls are fabricated and their optical properties are studied