The present disclosure provides a host for sleep monitoring device which includes a host body and a switch arranged on the host body. The host for sleep monitoring device further includes a top cover and a second magnet arranged on the inner surface of the top cover. The host body includes a housing and a first magnet arranged on the outer surface of the housing. The host body and the top cover are pulled together by the first magnet and the second magnet. The present disclosure further provides a sleep monitoring device. In the embodiments of the present disclosure, since the host for sleep monitoring device includes the host body, the top cover and the second magnet arranged on the inner surface of the top cover, the host body includes the housing and the first magnet arranged on the outer surface of the housing, and the host body and the top cover are pulled together by the first magnet and the second magnet, the bedspread is sandwiched between the host body and the top cover. Therefore, the problem regarding the fixation of the sleep monitoring device is solved, the fixation of the sleep monitoring device of the present disclosure is solid and the damage to the mattress and the sleep monitoring band is avoided.
