A heart rate meter and a method thereof are provided. The method is adopted by a sensing circuit of a heart rate meter, wherein the sensing circuit includes a pulse sensor and a proximity sensor. The method includes: determining whether the sensing circuit is close to a neighboring object according to a proximity output signal of the proximity sensor determining whether the sensing circuit is hung in the air according to a direct current (DC) output signal of the pulse sensor and when the sensing circuit is close to the neighboring object and is not hung in the air, determining that the measuring circuit can measure an electrocardiographic signal of the neighboring object.
