There are not a few fire accidents occurring around us, and fire types are also occurring in various ways. Among the various fire accidents, this study tried to find out about fire accidents related to portable butane gas. Portable butane gas, which is most commonly used by many people around (home, general restaurant, outdoor, etc.), has established itself as an essential cooking utensil in Korea. Because of the high frequency of use, it is not uncommon for accidents to occur. So, in this study, I became interested in the safety of the portable butane gas burner, which has been firmly established as a cooking utensil, and at the same time reached the stage of confirming its danger through empirical experiments. Therefore, we investigated what factors could cause a fire accident when using a portable butane gas cooker, such as using an excessive fire plate, and conducted a numerical analysis of the risk through a verification experiment tailored to it. As a result, it was found that the risk of explosion of butane gas due to negligence in use still exists.