Abstract: In order to better evaluate the benefits of biogas slurry utilization, based on the emergy analysis methods, the ecological-economic benefits of 4 different patterns of biogas slurry utilization were evaluated and compared at the subsystem and system levels. The four energy indices, including energy yield ratio (EYR), environmental loading ratio (ELR), energy sustainable indices (ESI) and energy yield ratio of biogas slurry (EYRB) were analyzed. The results showed that, EYR of the orchard, vegetable land, pasture and fish ponds subsystems were 1.73, 1.50, 0.70 and 2.15 respectively; ELR of the orchard, vegetable land, pasture and fish ponds subsystems were 0.66, 0.73, 0.46 and 0.26 respectively; and ESI of the orchard, vegetable land, pasture and fish ponds subsystems were 2.62, 2.06, 1.50 and 8.21 respectively; Additionally, EYRB of the orchard, vegetable land, pasture and fish ponds subsystems were 8.31, 5.80, 1.69 and 2.92 respectively. Compared at the system level, EYR and ESI of the system of using biogas slurry were higher than those of not. And the system can obtain higher economic benefits by using biogas slurry.