Abstract: A mini display device is provided, including: a main body, including an electronic module which includes an arithmetic processing unit, a storage unit and a power source electrically connected to the arithmetic processing unit, a mini display piece which includes at least one application software and a mini lens module which is disposed on the mini display piece, the arithmetic processing unit being communicatively connected to the storage unit and executing the at least one application software, the mini display piece being communicatively connected to the electronic module, the mini lens module including a shell which is hollow, a barrel and a lens, an end of the barrel being in communication with and end of the shell, the lens being disposed on another end of the barrel, another end of the shell facing toward the mini display piece.