As 6G space-air-ground integrated networks advance,satellite-based Earth exploration services have found extensive applications across various domains.However,the interference challenges faced by passive Earth Exploration-Satellite Services(EESS)are becoming increasingly prominent.The emergence of 6G native intelligence offers innovative solutions to address these issues.This paper focuses on interference mitigation and optimization strategies for passive EESS based on ITU standards,divided into two parts:first,the impact of ground base stations with varying environmental densities on satellite coverage areas is analyzed under minimum elevation angles and the complex 6G space-air-ground environment to assess compliance with ITU interference thresholds;second,leveraging 6G native intelligence,ground base station beamforming vectors are optimized to maximize static aggregate system throughput while ensuring adherence to the interference thresholds.The findings provide insights into improving passive EESS performance,offering theoretical and practical guidance for interference management and performance optimization in satellite communication systems in the 6G era.