本篇研究主旨在於計算設計完成之太陽能飛機的氣動力導係數,並且使用氣動力導係數計算該飛機之安定性,判斷該飛機之安定性是否為穩定。再藉由飛機安定性為穩定狀態下之氣動力導係數計算出特徵矩陣,並且在Matlab/Simulink&SISOTool環境下使用特徵矩陣去設計該飛機之控制器。再使用Pixhawk與X-PLANE 10結合,模擬在類真實狀態下的飛行,驗證該控制器是否符合真實情況之飛行,最後藉此控制器使太陽能飛機能夠穩定在空中巡航。 The main idea of this research is about calculate the aerodynamic derivate of solar powered aircraft .Moreover , we use aerodynamic derivate to manage the safety and stability of aircraft . While aircraft is stable , we use aerodynamic derivative to circulated eigenmatrix , further created the controller of aircraft in Matlab/Simulink&SISOTool environment . We use the combination of Pixhawk and X Plane 10 to imitate the real flying situation . By this experiment , we verify the controller fits the real flying situation or not .Eventually ,we are able to stabilize the solar powered aircraft to cruising with controller.