Abstract: Provided is a system for automatically analyzing a cloud cover in an optical satellite image based on machine learning, and more particularly, a system for automatically analyzing a cloud cover in an optical satellite image based on machine learning capable of automatically analyzing a cloud cover in an optical satellite image through a machine learning model that re-defines object classes in the satellite image, classifies indicator characteristics of white ground surfaces, white objects, and the like, which are similar to each other in reflection characteristics, such as snow and ice, and detects a cloud cover on a pixel basis to improve a deterioration in accuracy of a conventional automatic cloud cover analysis method.