This document summarizes research on using remote sensing indicators to monitor crop growth at different scales. At the canopy scale, soil-adjusted vegetation indices (SAVI) with different L values were found to be suitable for monitoring winter wheat growth across different phenological stages. At the regional scale, SAVI had limitations for dense crop coverage areas. For dense coverage, the relationship between vegetation indices and crop growth improved with larger pixel sizes, but this trend was not observed for low crop coverage areas. The research aimed to identify optimal indicators for crop monitoring at different scales.