A t the beginning of this paper, the decentralized world (DW) and decentralized world economy (DeWe) were defined. And the blockchain industry was pointed out to be at the initial stage of the decentralized world parallel to the real world. Then a set of systematicsolutions, named Electronical Material Information Technology (EMIT), was proposed, after which the development direction and path of the decentralized world economy was put forward, from its limitations, by arguing how to provide sufficient and necessary basic conditions for the decentralized world development. In the end, the EMIT was proved to be an effective reference for building the decentralized world from the basic level to the application level and enabling its sustainable development.