A light docking station applied to at least one portable electronic device, including: a bottom board module, a casing module, a circuit module, a first input/output module, a second input/output module, and a retaining module. The casing module has a casing mating with the bottom board module. The circuit module is disposed inside the casing of the casing module. The first input/output module is disposed on the casing of the casing module and electrically connected between the circuit module and a plurality of different peripherals. The second input/output module is disposed on the casing of the casing module and electrically connected between the circuit module and an external connector of the portable electronic device. The retaining module is disposed on a top side of the casing in order to mate with two retaining grooves that are disposed on a bottom side of the portable electronic device.