A server rack system includes a rack and a network board card. The rack includes rack layer type spaces arranged along a vertical axis direction. The rack layer type spaces are used for receiving a network switch unit and a server unit slidably inserted along a horizontal axis direction. The network board card is disposed along the vertical axis direction and between the top and the bottom of the rack. The network board card includes network interfaces. The network interfaces are arranged along the vertical axis direction on the network board card. The network interfaces include a first type network interface used for being connected to the network switch unit and a second type network interface used for being connected to the server unit. The first type network interface is connected to the second type network interface by an integrated circuit deployed in the network board card.