The paper discusses a matrix expression method for the configuration transformation of metamorphic mechanism. A matrix with whole information can describe all structural information on metamorphic mechanism, and we put forward its configuration transformation formula. The retrieval of the matrix can help obtain a lot of information, including number of kinematic joints, number of multiple components, number of muhiple joints, size of multiple components, link connectivity, etc. The retrieval of its extension matrix produces kinematic parameters of the driving link and housing of the metamorphi...