The current regional power grid planning is analyzed in the perspective of smart grid development and regional power grid planning system. By combining the theory of economy management in system way with the practice of power grid planning and taking into consideration the balance among the four major factors of power grid performance， power grid efficiency， social benefits and cost of electricity network， an adaptive power grid planning system for smart grid is proposed. The three-stage production function with multiple factors is adopted to build the synthetic effectiveness index of the total electric network system（SEITENS） to guide the research of power grid planning topics. A multi-phase， multi-section， multi-target planning procedure with perfect feedback mechanism is described.