The LAPD15 international Symposium is a biennial Laser Aided Plasma Diagnostic conference. It is originally inaugurated at Kyushu University, Kyushu, Japan in 1983 and has been organized by host Institutes around the world (e.g. Japan, Europe and the United States). This is the first time bringing this Symposium to Korea and the fusion plasma center, POSTECH, Pohang, Korea will host the LAPD15. The Symposium will bring the worldwide diagnostic experts together from various disciplines including laser physics, chemistry and physics of the low-temperature plasma and physics of fusion grade plasmas. The Symposium is an important and fruitful source for cross-fertilization between these fields. The topics for the Symposium include diagnostic tools and systems aided by lasers and microwaves for fusion plasmas, industrial processing plasmas, environmental plasmas as well as for other plasma applications.