A switch system has a master sub-switch and a slave sub-switch, the master sub-switch having a first bridge for transmitting the received packet via the first bus, a second bridge for transmitting the packet when the address information of the second bridge matches with the address information included in the packet, and a third bridge for receiving the packet from the first bridge and transmitting the packet to the slave sub-witch, the slave sub-switch having a fourth bridge for receiving the packet from the third bridge and transmitting the packet, and a fifth bridge for receiving the packet from the fourth bridge, and transmitting the packet when the address information of the fifth bridge matches with the address information included in the packet, wherein the master sub-switch has a table including address information of the fifth bridge, and transmits the packet to the fifth bridge in reference to the table.