Aiming at the problem of the off-grid outdoor energy supply of the fish crab paddy field flying insect predator, the research is focused on the energy supply system of the device. Based on the rationality requirements of outdoor energy supply, small wind turbines and solar panels are used for autonomous energy supply; Matlab/Simulink modeling is used for small wind turbines and solar panels, focusing on the wind energy utilization factor of the impeller, The correlation between the blade tip speed ratio and the pitch angle is quantified, and the solar panel is analyzed by using a single factor analysis method. Under the conditions of the determined pitch angle, the appropriate value of the blade tip speed ratio can obtain the maximum wind energy utilization coefficient. At the same time, under different temperature and radiation conditions, the solar panel can achieve the peak of the power curve, providing theoretical support for the maximum power acquisition of wind and solar complementary. Aiming at the rational use of energy in off-grid wind-solar complementary systems, an energy management strategy for hybrid energy supply is proposed, which meets the energy demand of the device, and provides a certain reference for the energy supply design of outdoor similar devices.