A blade server that includes at least two data processing modules for receiving data and processing the received data; an exchange backboard for achieving data exchange between the data processing modules, and also for achieving data exchange between each of the data processing modules and an interconnection module; the interconnection module for achieving connection and high-speed data exchange between the data processing modules; an I/O interface module for achieving a connection between the blade server and an external network; and a management and control module for controlling the switching between the data processing modules and also for monitoring and managing the blade server. The blade server unites multiple networks such as a high-speed network, an Ethernet, a KVM network and a management network, reduces the cost for high-speed exchange, and reduces the delay for network exchange.