Image recognition method and device thereof and AI model training method and device thereof

An image recognition method and device and an AI model training method and device are provided. The image recognition method includes: retrieving an input image by an image sensor; detecting an object in the input image and multiple characteristic points corresponding to the object, and obtaining a real-time 2D coordinate information of the characteristic points; determining a distance between the object and the image sensor according to the real-time 2D coordinate information of the characteristic points through the AI model; and performing a motion recognition operation to the object when the distance is less than or equal to a threshold.