The phonon

quantized lattice vibration

plays a fundamental role in condensed matter physics. Professor Kun Huang is known throughout the world for his many pioneering contributions to physics

in particular to the phonon physics

a branch closely related to the luminescence in solids. His book entitled "Lattice Dynamics in Crystal Lattice"(in collaboration with Nobel laureate M. Born)is the first comprehensive and compact presentation in this field on the basis of quantum mechanics

which

although published about half century ago

is still used as standard textbook until now. In his early articles on the interaction between radiation field and ionic crystals

he first proposed an important idea later known as "polariton"

which has changed our way of thinking about the propagating the EM Modes in crystalline media. His theory on multiphonon transition in semiconductors and insulators

the Huang-Rhys theory

which dealt with both the multiphonon optical and non-radiative transitions

laid the foundation of this important field. He pointed out the possibility of observing X-ray diffuse scattering in crystals due to impurities at first

later known as "Huang's diffuse scattering". In early 1950's

he formulated a pair of phenomenological equations relating the long-wavelength optical vibration to macroscopic electric field and polarization

which has been widely applied and named as Huang's Equation. As a 70 years old man

he and his collaborator resolved a puzzle about the optical phonon modes in semiconductor superlattices and worked out the "Huang-Zhu Model". In recognition of his lifetime achievements

Huang was recently honored with the Supreme Scientific and Technological Award in China. Huang's main scientific contributions and their significance are briefly reviewed in this paper.