A beauty device includes a power bank and at least one beauty instrument. The power bank includes: a connecting interface which is configured on one side of the power bank, a touch switch which is configured next to the side of the connecting interface, a control module which connects with the connecting interface and the touch switch and a power output module which connects with the control module. A power output module is composed by connecting a power management module and a battery module and also the power management offers different power supply specifications. The beauty instrument has a beauty function output module and the beauty instrument connects with the head and the connecting portion. The power management module offers appropriate power supply specification to the beauty instrument so the power bank can be transformed from single function to the power bank with multiple functions.
