The invention relates to an electricity market economic model modeling method adaptive to a plurality of investment subjects. The method comprises the following steps: (1) dividing an economic unit on a physical unit level; (2) designing an economic model structure of a market member; (3) designing a business data model structure; and (4) designing relationship between an electricity market transaction operation system interface and the business data model structure. After one physical unit is invested by a plurality of power plant market member subjects, multilevel and extensible electricity market economic models, such as a market member, a business department, the physical unit, the economic unit and the like, are established to adapt to the realization of the whole-process management of a relevant business data flow of the economic model in a plurality of business links, such as competitive price transaction, contract signing, electric quantity plan compiling, electric energy settlement and the like, in electricity market operation.