Embodiments of the present invention provide a node interconnection apparatus, a resource control node, and a server system. A resource access function is separated from a computing node, and a resource control node is provided to implement the resource access function. The resource control node has a resource interface used for access to a storage resource or a network resource, the resource control node may be connected to the computing node by using a device interconnection interface, and the resource control node is configured to provide a storage controller or a network controller, so as to implement access to the storage resource or access to the network resource. Correspondingly, the computing node that is connected to the resource control node by using the device interconnection interface may not need to implement a related function of the storage controller or the network controller any more. The resource control node is configured to access a storage device or a network by using the resource interface, allocate, according to a storage resource of the storage device, a storage resource or a network resource that belongs to the computing node, receive an access request, which is sent by the computing node, for the allocated storage resource or the allocated network resource, and perform a storage operation on the allocated storage resource or access the allocated network resource by using the resource interface.