The invention provides an unmanned aerial vehicle target positioning method and
system. The method comprises the steps that an image feature
database of a
satellite remote sensing image is established; an unmanned aerial vehicle reconnaissance image is acquired and preprocessed; multi-scale image feature extracting is carried out on the preprocessed unmanned aerial vehicle reconnaissance image; an
image retrieval similarity measurement model based on
granular computing is established, and matching computing is carried out on the extracted image features and image features in the image feature
database according to the
image retrieval similarity measurement model to acquire a similarity measurement value; and the geographic position corresponding to the
satellite remote sensing image with the similarity measurement value satisfying a preset threshold value is determined as the unmanned aerial vehicle target position. The method and
system can accurately position an unmanned aerial vehicle target.