Abstract: As Near Space Information System (NSIS) doesn′t have effectiveness estimation system, the process and result of design take a risk, so effectiveness evaluation system (EES) of NSIS is proposed for the first time.According the characteristic that the structure of NSIS and evaluation guide lines are complex, the ADC evaluation architecture which integrated Analytic Hierarchy Process (AHP) is set up.EES solved the problem that distributing weight of system ability, and put forward math evaluation model of NSIS ability and its sub target.The system provided an effective way to demonstrate cost, feasibility and risk of NSIS.