1. A health care apparatus comprising: a sensing position determining unit to determine a body part of an examinee where vital signals of the examinee are sensed; a vital potential sensing unit configured to sense different potential signals of the examinee based on the determined body part; and an analyzing unit to analyze the potential signals, wherein the sensing position determining unit comprises: an examining unit to examine whether an acceleration of the body part meets a predetermined magnitude; and a body part determining unit to determine the body part in response to an examined result.