A carrier module is provided for supporting at least one data storage device. The carrier module is electrically connected to a power supply module. The carrier module includes a main body, a first socket, a second socket, a connecting port, and a detection unit. The first socket, the second socket, and the connecting port are disposed on the main body. The connecting port and the detection unit are electrically connected to the first and second sockets. The data storage device is detachably connected to the connecting port. The detection unit detects whether the power supply module is electrically connected to the first socket or the second socket.