Modeling of indirect power supply planning was performed through the reprogramming of the original coal-fired electric generating sets based on total quantity control and environmental cost. The established model could demonstrate when the desulfurizing units should be installed onto large coal-fired electric generating sets, and when the small coal-fired electric generating sets should be closed-down in a generate electricity units with SO2 emission as the most significant constraint. The resulted information in a case study indicated that the model could provide more detailed plan for the next maximum development of the generate electricity units in a new five years' plan, with limited target of SO2 emission.