The aim of this research was to research the capability of firefighters’ functional tests tomeasure the actual level of their cardiovascular fitness. Method: 25 people were selectedvoluntarily among the newly employed firefighters. The raised tests from this group wereinclude of Iran and Hong Kong’s index functional tests; which at the final stage the firefighters’aerobic power were evaluated by direct method under standard conditions; at Olympic NationalAcademy.The results of the research revealed that the VO2max relative values of individuals in HongKong and Iran testes were: (SEE=0.03; R=0.23 SEE=0.15; R=0.03 respectively); which werenot remarkable statistically (p>0/۰۵). Thus; according to the results of this research; thecardiovascular with a threshold scale of 45 ml.min-1.kg-1 might be a sign of a desirable level forfiremen.