Taking the Baota district of Yan'an City and seven townships(towns) of Ansai County for example

this paper discussed the evolution of regional agro-ecological economic system and the corresponding changes in its ecological and economic benefits.We recognized the major contents of agro-ecological economy and its main influencing factors

and predicted the per-capita income in the following 5-15 years

and the population

per-capital basic farmland

orchards and sheep in the next 30-40 years in its typical watershed region.By the method of system analysis

the main 20 specific indexes from the indexes system were further recognized

which can be categorized into eco-environment

economic benefit and sustainable development

we worked out to construct the eco-agricultural economic indicators evaluation system that are suitable for the loess hills and gully region.