A series of The International Conference on Nanophotonics (ICNP) is a topical conference sponsored by The Optical Society of America, held in China and Japan in the past five years (Hangzhou in 2007, Nanjing in 2008, Harbin in 2009, Tsukuba in 2010, Shanghai in 2011). The Nanophotonics 2012 will take place on May 27 to 30, 2012 at Peking University, Beijing, China, co-sponsored by ICO. Nanophotonics is a rapid growing and emerging multidisciplinary field that deals with optics/photonics on the nanoscale. The objective of this topical conference is to bring together international scientists and researchers interested in the recent developments in nanophotonics. The topics will include but not be limited to (1) nanophotonics for bio/energy/environment, (2) nanophotonics for information technology and (3) fabrication/characterization/modeling for nanophotonics, from materials science, device physics/chemistry to optic/photonic applications.