Based on the interpretation of satellite images of the "two lakes and one reservoir" in 1973, 1993, 2001 and 2010, using RS and GIS, the spatial database of regional land use/cover changes(LUCC) was established, and the LUCC characteristics of temporal and spatial variation over past 40 years was quantitatively analyzed; Meanwhile, the LUCC's impact on ecological environment was discussed. The results show that:(1) Dry land, paddy field and woodland are main land use/cover types in "two lakes and one reservoir"(Hongfeng Lake, Baihua Lake and Aha Reseruior) region;(2) Compared with 1973, grassland decreased rapidly, only accounting for 1.02% of the area; construction area increased 207.93%; the forest land area increased by 13.51%; area of cultivated land(dry land, paddy field ) decreased by 18.41%; the water area increased by 42.06%;(3) Cultivated land mainly transferred to the woodland and construction land, grassland transfered mainly to forest and water area, forest land mainly transfered to the construction land.