I will give a brief review on the several physical processes for generating the high-energy gamma rays in the star-forming galaxies. LMC is such a galaxy with only ~50 kpc away from our galaxy. With more observations by Fermi-LAT, it is a opportunity to distinguish the profile of the high-energy gamma rays in the LMC field. We use the two models to recover the observations of the LMC, one is derived by the standard method of 3FGL and another one is to employ the most recent components by Fermi-LAT team. The latter one gives the better fits both with 4 years' data (time of 3FGL) and the recent 8 years' data of Fermi-LAT. A hadronic origin could be the most promising process accounting for the pure large-scale emission. We also find a strong gamma-ray detection that is very close to the LMC, J0443-6650, which is found to be associated with a FSRQ.
