The Second LHAASO Collaboration Conference in 2026 & The Academic Symposium for the 10th Anniversary of the LHAASO collaboration

The Hubble constant is of paramount importance in astrophysics and cosmology. The precise determination of the Hubble constant is one of the critical problems in modern cosmology. In this poster, we present our preliminary results on measuring the Hubble constant using extragalactic sources observed by LHAASO and Fermi-LAT. By combining observations across a broad energy range, we aim to investigate the potential of gamma-ray observations to constrain the Hubble constant.