Abstract: This study utilized the Remote Sensing Ecological Index(RSEI) to analyze the characteristics of ecological environment quality(EEQ)evolution and its responses to environmental factors and land use changes in Fujian Province from1990to2022.The results indicate:(1) From1990to1995,EEQ in Fujian Province showed a "good in southeast, poor in northwest" spatial pattern; areas with inferior EEQ gradually increased from2000onwards, with improvement being noted after2010.(2) EEQ transitions during1990～1995,2005～2010,and2010～2015predominantly shifted from medium or higher levels to medium levels, while other years showed transitions from lower to medium or higher levels.EEQ in cultivated land areas mostly transitioned from lower to medium or higher levels.(3) From1990to2010,EEQ exhibited a trend of increasing in the northern part and decreasing in the southern part, characterized by high volatility; from2011to2022,it showed a trend of increasing inland and decreasing along the coast, with lower volatility.(4) Surface temperature rise and increased humidity positively influenced EEQ,while dryness had a negative impact in the south and a positive impact in the north.The vegetation index primarily negatively impacted EEQ.(5) Except for forest and cultivated land, other types of land showed increasing trends, notably with significant growth in impermeable surface area, impacting evolution patterns of overall land use.The declining trend of EEQ in Fujian Province suggests the need for targeted policy adjustments in ecological maintenance and governance.Future efforts should focus on standardizing land use structure and enhancing strategies for natural disaster protection to achieve balanced economic development and ecological prosperity.