This study aims to investigate the combustion temperature of a rocket-type ceramic burner when using Compressed Natural Gas (CNG) as a fuel instead of Liquefied Petroleum Gas (LPG) through Computational Fluid Dynamics (CFD) methods. The simulations were conducted using Fluent 2021 R2 with a 3D model, comparing the combustion temperature of CNG with LPG. The results reveal that as the heat input increases, both the flame length and maximum temperature rise. At 30.02 kW, the maximum temperatures obtained from LPG and CNG were 1396 and 1842 K, respectively. Moreover, the maximum temperatures from CNG were consistently higher than those from LPG at all heat inputs. This difference is attributed to the higher primary air intake from CNG, enhancing the effectiveness of premix combustion. Consequently, transitioning from LPG to CNG as a fuel for a rocket-type ceramic burner holds the potential for energy savings and reduced emission.