An electronic device comprising a camera module and a driving device , the electronic device defining a channel , and the driving device comprising: a driving board , fixedly connected with the camera module and comprising a rack ; a driving motor , comprising an output shaft mounted with a driving gear ; and a driven gear , meshed with both of the driving gear and the rack , wherein a diameter of the driven gear is greater than a diameter of the driving gear ; wherein the driving motor is configured to drive the driving board to move along a direction from the channel to an outside of the electronic device through rotation of the driving gear and rotation of the driven gear , thereby to drive the camera module from being in the channel to the outside of the electronic device , wherein the driving device drives the driving board and the camera module to move in a direction perpendicular to a display screen of the electronic device ; wherein the driving device further comprises a first transmission gear and a second transmission gear , the first transmission gear is meshed with the second transmission gear ; a diameter of the first transmission gear is smaller than a diameter of the second transmission gear ; the first transmission gear is meshed with the driving gear , and the diameter of the first transmission gear is greater than the diameter of the driving gear ; the second transmission gear is meshed with the driven gear , and the diameter of the second transmission gear is smaller than the diameter of the driven gear ; and wherein the electronic device further comprises a moving device connected with the camera module , and the moving device is configured to further move the camera module , after being moved by the driving device to the outside of the electronic device , to an outer periphery of the electronic device . a driving board , fixedly connected with the camera module and comprising a rack ; a driving motor , comprising an output shaft mounted with a driving gear ; and a driven gear , meshed with both of the driving gear and the rack , wherein a diameter of the driven gear is greater than a diameter of the driving gear ; wherein the driving motor is configured to drive the driving board to move along a direction from the channel to an outside of the electronic device through rotation of the driving gear and rotation of the driven gear , thereby to drive the camera module from being in the channel to the outside of the electronic device , wherein the driving device drives the driving board and the camera module to move in a direction perpendicular to a display screen of the electronic device ; wherein the driving device further comprises a first transmission gear and a second transmission gear , the first transmission gear is meshed with the second transmission gear ; a diameter of the first transmission gear is smaller than a diameter of the second transmission gear ; the first transmission gear is meshed with the driving gear , and the diameter of the first transmission gear is greater than the diameter of the driving gear ; the second transmission gear is meshed with the driven gear , and the diameter of the second transmission gear is smaller than the diameter of the driven gear ; and wherein the electronic device further comprises a moving device connected with the camera module , and the moving device is configured to further move the camera module , after being moved by the driving device to the outside of the electronic device , to an outer periphery of the electronic device . <EOS>