Abstract: A system for alternating lighting-emitting of solid state disc (SSD) is provided, including a plurality of SSDs and an application program. Each SSD includes a processing unit and a lighting-emitting unit. The processing unit is able to trigger the lighting-emitting unit to emit light in a preset mode. The lighting-emitting units define a lighting-emitting module. The application program is installed in a mobile electronic device. The application program sends a signal to the processing units of the SSDs via the mobile electronic device to match with and identify the SSDs, and the application program can make each said processing unit control the light-emitting unit to emit light and make the light-emitting module emit light in a preset mode.