A health care device includes a health care body for positioning a body part of a user, so as to maintain a first specific positional relationship with the body part, wherein the body part has an acupoint; an acupoint work piece for performing a health care work onto the use through the acupoint; and a work piece holder having a first end connected to the health care body and a second end for fixing the acupoint work piece, so that under the first specific positional relationship, the acupoint work piece performs the health care work under the condition that the acupoint work piece has a second specific positional relationship with the acupoint. A health care body, method and system are also provided.