Gamma-ray Astronomy 中国斜学我术大学 University of Science and Technology of China Atmosphere is opaque for gamma-rays Satellite or air shower Fermi LAT H.E.S.S LHAASO (0.1~1000GeV) (0.1~10TeV) (1Te)Gamma-ray Astronomy • Atmosphere is opaque for gamma-rays • Satellite or air shower Fermi LAT (0.1 ~ 1000 GeV) LHAASO (>1 TeV) H.E.S.S (0.1 ~ 10 TeV)