The disclosure discloses a registration method or an unregistration method for a home information machine and a home information machine thereof, to solve the problem of low security and reliability in the prior art when a Portable Part (PP) machine is registered on the home information machine. The registration method comprises: a Fixed Part (FP) module of the home information machine receives a registration command and first verification information sent by a Mobile Internet Device (MID) module of the home information machine, wherein the first verification information is used to verify verification information input by the PP machine to be registered; the FP module enters a registration state, and receives a registration request and second verification information sent by the PP machine to be registered; the FP module verifies the second verification information by the first verification information, determines whether the registration of the PP machine to be registered is successful according to the verification result, and exits the registration state when determining that the registration of the PP machine to be registered is successful. When the technical solution of the disclosure is used, security and reliability during the registration process of the PP machine can be improved.