Smoke detection system and smoke detection method

A smoke detection system and a smoke detection method are provided. The smoke detection system includes a camera, a storage unit, and a processor. The camera obtains a current image and a previous image. The storage unit stores multiple modules. The processor is coupled to the camera and executes multiple modules. The processor generates a difference image according to the current image and the previous image. The processor inputs the current image and the difference image to a semantic segmentation model, so that the semantic segmentation model outputs a smoke confidence map. The smoke confidence map is generated based on a current environment being a dark environment or a bright environment. The processor analyzes the smoke confidence map to determine whether a smoke event occurs in the current image.