The common methods of the protocol conformance testing include three steps:create model by the protocol specification; generate test suite from the model; execute this test suite.There are two problems in these methods:the first is low efficiency; the second is the actual range of testing being reduced.In this paper
a method about alterable test suite will be introduced to improve the efficiency by dynamically executing the test suite
and expand the actual range of the protocol conformance testing without depending on the protocol implementation.