Aiming to MAC layer, Adapter layer, Network layer and Router protocol of 6LoWPAN protocol stack, this paper studies the conformance testing method of 6LoWPAN protocol stack, introduces the TTCN-3 testing standard into the conformance testing of wireless sensor network, and designs a 6LoWPAN protocol conformance testing instrument, which uses both TTCN-3 as protocol testing description language and protocol conformance testing model defined in ISO9646 as method.