A double pole double throw switch device is provided. The device includes a first path circuit, a second path circuit, a third path circuit and a fourth path circuit. The first terminals of the first and second path circuits are coupled to a first port, and the second terminals of the first and second path circuits are respectively coupled to a third port and a fourth port. The first terminals of the third and fourth path circuits are coupled to a fourth port, and the second terminals of the third and fourth path circuits are respectively coupled to the second port and the third port. Each path circuit includes a switch module and a functional switch circuit. When a switch module is turned on, its corresponding functional switch circuit is turned off, and when the switch module is turned off, its corresponding functional switch circuit is turned on.