A heart rate alarm system includes an article of clothing, at least two conductive units, at least one alarm device, a heart rate measurement unit, a first transmission unit, a second transmission unit, and an operation unit. The at least two conductive units are coupled to each other through at least one conductive fibric. The heart rate measurement unit measures a heart rate through the at least two conductive units, and generates a control signal and a heart rate value according to the heart rate. The first transmission unit transmits the control signal to the at least one alarm device and transmits the heart rate value. The at least one alarm device generates at least one alarm signal according to the control signal. The operation unit calculates a heart beat period, a heart physiological age, indicators of autonomic nervous system, and/or a calorie consumption indicator.
