Six major professional calculation tools, including natural ventilation, thermal compression ventilation, mechanical ventilation, daylighting coefficient, window to ground ratio, and sunshine spacing. Each calculator is based on the corresponding principles of fluid mechanics and building optics, providing detailed parameter inputs, intelligent evaluation systems, and professional optimization suggestions. It is suitable for professionals such as architects, HVAC engineers, architecture students, and ordinary users interested in the building environment. The application adopts a cartoon style UI design, accompanied by soft color schemes and rich emoji icons. Through diverse control layouts and smooth animation transitions, it provides users with a pleasant user experience. All calculation results comply with Chinese architectural design standards, providing reliable reference for building environment design.