[Objective] The ecological environmental quality of a feldspathic sandstone area was investigated in order to provide a scientific basis for local ecological environmental management. [Methods] The spatial-temporal evolution of ecological environmental quality in a feldspathic sandstone area was analyzed using GIS and remote sensing technology, and a remote sensing ecological index (RSEI) model. [Results] ① RSEI extracted from the four-stage imaged data of a feldspathic sandstone area showed a trend of initially decreasing and then increasing, indicating that the ecological environmental quality was slowly improving. ② Greenness ecological index and humidity ecological index were positively related to ecological environmental quality in a feldspathic sandstone area, while dryness ecological index and heat ecological index were negatively related. Greenness ecological index had a higher contribution rate to ecological environmental quality improvement. ③ From 2001 to 2020, 36.79% of the total study area improved in ecological environmental quality. Over that same period, 15.68% of the total area deteriorated in ecological environmental quality, and the ecological degradation area was mostly classified as mild degradation. [Conclusion] The ecological environmental quality of a feldspathic sandstone area increased from 2001 to 2020. Ecological environmental quality was highly sensitive to human activities. The concept of ecological protection should be integrated into management practices to improve the ecological environment in order to achieve harmonious coexistence between man and nature.