In order to solve the trouble that the precision is too low because of the lack of the swatch, the Bootstrap method is used to evaluate some of the parameters of the air-borne buoy submarine reconnaissance system. The evaluation steps of aim-discovering rate for success or lost index is introduced. Three kinds of typical index such as the aim-discovering rate, available incept distance of buoy signal and certain extension sensitivity progress emulated. The result shows that the method can improves the emulation precision.