A detachable intelligent back cover is disclosed and comprises a cover body detachably connected to a middle frame of a casing of an intelligent terminal, a circuit board fixed to an inner surface of the cover body, and a spring probe assembly electrically mounted on a corresponding circuit board and protruding backwardly from the cover body; wherein lighting elements or spare batteries, or speakers are provided on a face of the circuit board toward the cover body. Such that back cover is not only used to protect the batteries, but also to be light sources, signaling lights, spare batteries, speakers, and the like. To use, it is only necessary to install the back cover on the intelligent terminal, in order to be automatically energized via the spring probe assembly. The back covers are selectively changed based on the requirements of users, to improve intelligence of the back cover.