High energy density is generally defined as a state with energy content larger than 1011 J/m3,or equivalently with pressure higher than 1 Mbar.High energy density matter widely exists in the universe,like the cores of Jupiter,Sun and Earth,as well as inertial confinement fusion.The creation of high energy density state in the laboratory and the research on its properties are very important in astrophysics,planetary sciences,geophysics,inertial fusion sciences and so on.Related to high energy density physics,we carried out a series of research activities including simulation of the state of warm dense matter at HIAF,ion-plasma interaction,highly charged ions induced nanoscale defect on surface and X-ray emission,as well as developing a new multi-channel pyrometer and high energy electron radiography.