Disclosed is a method of diagnosing cardiopulmonary health through a heart rate measurement and a diagnostic system and a recording medium Therefore, which can conveniently measure and analyze a heart rate and manage an electrocardiogram anytime and anywhere while overcoming time, space, and cost restraints, which are limits of a PAPS (Physical Activity Promotion System) performed under a situation where a certain environment and condition are constructed in order to measure and analyze a heart rate or a method of measuring and analyzing an electrocardiogram performed on a treadmill after a heart rate measurement sensor is attached to each part of a body of an athlete and the athlete wears a mask in order to measure a cardiopulmonary endurance of the athlete.
