A micro server is provided. The micro server includes a plurality of computer boards, at least one switch device, and a baseboard. The plurality of computer boards are for data processing. The switch device is electrically connected to the plurality of computer boards and is for data communication between the plurality of computer boards. The baseboard is for data communication and power supply. The communication between the plurality of computer boards is through the baseboard and the plurality of computer boards communicate with the switch device and the external network by Serial Rapid I/O (SRIO).