The 27th International Union of Geodesy and Geophysics General Assembly marked 100^th anniversary of IUGG and held from 8 to 18 July, 2019 in Montreal,Canada. The general assemble includes union lectures,scientific sessions,joint symposium and electing the executive committee,awards and honor,and elected fellows. Some seismologists and geophysicists represent the research progress in the field of seismology and geophysics,including deep exploration in the earth,the detection of the other planetary and earthquake early warning et al.