Temperature measurement experiment of laser irradiated 30CrMnSiA steel with mach number of 0.5 airflow is performed, experimental results show that the temperature rising rate and maximum rising temperature are declined in airflow comparing with static condition. And the absorbed heat flux density and temperature history on laser irradiated surface with airflow are achieved by numerical inverse method. Comparing with the result on static condition, the absorbed and conducting heat flux with airflow is more than the one on static condition at the same temperature. It is analyzed that this result is due to accelerating oxidation reaction by airflow and influencing the reflectivity on laser irradiated surface of metal.