The embodiment of the invention provides a method and a system for testing surge, and the method comprises the following steps: receiving a surge signal sent by a surge signal generator through a coupling network by a second fixture via a first port thereof, wherein the first port is connected with the output port of the coupling network through a first connection wire; transmitting the surge signal to a port of a first fixture by the second fixture through a second port thereof, and transmitting the surge signal to a port to be tested of a device to be tested by a third port of the second fixture to test the surge tolerance of the port to be tested; connecting the second port with the port of the first fixture via a second connecting wire, and connecting the third port with the port to be tested via a third connecting wire; and connecting each two of the first port, the second port and the third port. The embodiment of the invention realizes the aim of testing surge tolerance on a port without a protection circuit on the premise that one port has a protection circuit while the other connected port has no protection circuit.