A cardiac regulating apparatus and a cardiac regulating method are disclosed. The cardiac regulating apparatus includes a control unit, a sensing unit and an analyzing unit. The control unit is configured for outputting a cardiac control signal in accordance with a heart rate of a heart. The sensing unit is configured for acquiring a blood pulse signal. In response to the cardiac control signal having a first constant cardiac rhythm, the analyzing unit is configured for analyzing amplitude and reflected wave time of the blood pulse signal, and for outputting a regulation parameter according to the amplitude and the reflected wave time of the blood pulse signal. The control unit is configured for regulating the cardiac control signal according to the regulation parameter from the first constant cardiac rhythm to a second constant cardiac rhythm different from the first constant cardiac rhythm.
