The stereo photographers are generally used to measure wing deformation during aircraft deformation measurement flight test, in order to gain a detailed understanding of the structural deformation of aircraft under flight conditions. However, further research on this subject proposes the idea of directly calculating flight loads based on the visual shape signal of the aircraft. However, traditional load finite element simulation calculation methods are limited in their flexibility in flight test applications due to their complexity and computational requirements. This article develops and demonstrates a simplified load calculation method, which utilizes visualization algorithms and existing aerodynamic models to simplify the calculation model and process data using MATLAB, thereby achieving real-time calculation of the aircraft’s main loads during flight tests. This method may be used for real-time monitoring of flight tests, flight load testing, and even long-term structural health monitoring systems.