The invention discloses a remote controller and a realization method thereof. The remote controller comprises an interface information storage unit, an instruction acquisition unit, a characteristic storage unit, an image acquisition unit, a characteristic extraction unit and a searching unit, wherein the interface information storage unit is used for storing control interfaces of at least two electrical appliances; the instruction acquisition unit is used for receiving instructions and calling the control interfaces of the corresponding electrical appliances according to the instructions; the characteristic storage unit is used for storing the instructions and preset identifying characteristics of the electrical appliances; the image acquisition unit is used for acquiring identifying images of the electrical appliances according to identifiers of the electrical appliances; the characteristic extraction unit is used for extracting identifying characteristics of the electrical appliances from the images; and the searching unit is used for searching the preset identifying characteristics of the electrical appliances, which are coincident with the identifying characteristics of the electrical appliances, in the characteristic storage unit, calling the corresponding identifying instructions of the electrical appliances and sending the identifying instructions to the instruction acquisition unit. By the remote controller and the realization method thereof, remote-control interfaces corresponding to the electrical appliances can be switched automatically.