Fertilization decision-making method and system based on multi-vegetation index image

The invention provides a fertilization decision-making method and system based on a multi-vegetation index image, and the method comprises the steps: obtaining a plurality of vegetation index images of crops based on a remote sensor carried by an unmanned plane, obtaining an element distribution diagram of each element of a farmland according to the content of a plurality of elements at each position in a plurality of positions through fusion, and obtaining a multi-channel image; setting a group of trainable parameters for each of preset elements, and training the decision model and the multiple groups of trainable parameters by adopting the multi-channel image; and determining a corresponding trainable parameter based on the target element, and determining a distribution condition of the target element by adopting the decision model according to the trainable parameter and the multi-channel image of the target farmland. According to the method, the soil fertility condition and the vegetation index are fused,