The International Astronomical Union (IAU) Office for Astronomy Outreach (OAO) is an IAU new office hosted at National Astronomical Observatory of Japan (NAOJ) at Tokyo. After the International Year of Astronomy 2009, IAU decided to establish the OAO to coordinate the international astronomical outreach efforts. Two major campaigns that OAO are running are the International Year of Light 2015 and the Public Naming of Exoplanets. IAU is one of the supporting organisation of the International Year of Light 2015 (IYL2015), and one of the IYL2015 cornerstone project is “Cosmic Light”, which connect astronomy to light. On the other hand, IAU has launched the NameExoWorlds campaign, to name exoplanets, however, using a different approach than the naming of solar system bodies like asteroids or comets, the naming of exoplanet will involve public voting and proposal nominations from public organizations.