Abstract: It has been the hot issues of current theoretical research and practice to seek solutions to social contradictions and conflicts and to improve the management level to maintain social stability and harmonious development. The opposite problem is one type of contradictory propositions whose principles and methods are based on the transforming bridge of extenics. It reviews the transforming bridge method and its application. The transforming bridge method and its principles focus mainly on describing the problemchain of conductive contradiction, the system of contradictory propositions and other problems such as the classification of the transforming bridge, its design, 〖JP2〗its system and its setting. The transforming bridge method has been applied mainly in product design, planning and social management. Future research may be done into the design of a transforming bridge by combining the transforming bridge method and theories with system dynamics, the conflict theory, the social movement theory and the theory of harmony.

Key words: extenics； the transforming bridge method； opposite problem