Abstract: The definition of "noise figure of any port" is extended to the case of nonequal input noise power, and two methods for testing noise figure of multiport network are put forward. The first method is convenient, which only requires measurement of the noise figure of any port. The second method contains no systematic error, but it is somewhat complicated. Examples for these two methods are given, and the results are compared, which suggests that these two methods are consistent with each other. In addition, the results of the second method prove that the systematic error in the first method can be neglected. These two methods are applicable not only to equal gain network, but also to nonequal gain network, and examples for nonequal gain network are included. This method can be applied to any multiport network such as T/R module for phased array radar.