The pressure arising from continuous increase in productivity on the ambient environment and the concomitant pollution threat call for integrated and more efficient environmental protection systems. Sewage treatment systems are technological means to handle the pollution resulting from the production activities, and environmental sustainability and economic viability are two important assessment parameters. Based on the traditional emergy analysis indicators (emergy yield ratio EYR, environmental loading ratio ELR, environmental sustainability index ESI and emergy benefit ratio EBR), the improved emergy indices (SEYR, SELR, SESI and SEBR, respectively) were proposed for assessing two integrated sewage treatment systems after considering effects of the waste and the product in this study. In addition, three economic evaluation indicators (the net income NI, the profitability ratio PR and economic investment ratio per unit sewage IR) were also exploited to evaluate and compare two constructed integrated sewage treatment systems (i.e., ‘sewage treatment plant＋dewatered sludge landfilling’ and 'sewage treatment plant＋reclaimed water reuse＋dewatered sludge landfilling’). Emergy evaluation and economic analysis are complementary approaches, with emergy evaluation focusing on the environmental support and effects of a production system while economic analysis method paying more attention to the market value of the products. Hence, a combination of them allows to gain a better understanding of overall performance of a sewage treatment ecosystem in terms of both environment and economy. The systems considered here were integrated with livestock sewage treatment systems, as the systems not only included the sewage treatment plant, but also were composed of treated water and dewatered sludge disposal options. This may give a whole picture of the ecological economic performance of the treatment of livestock sewage. The results showed that, system 2 (‘sewage treatment plant＋reclaimed water reuse＋dewatered sludge landfilling’) has a much greater environmental sustainability index than system 1 (‘sewage treatment plant＋dewatered sludge landfilling’) suggesting the former is much more sustainable, and that incorporation of a reclaimed water reuse system is a valuable way for promoting the sustainability of a sewage treatment system since the reuse system of reclaimed water not only produced new water resources from reclaimed water but also saved the cost for discharging treated water which is charged according to the relative regulations. System 2 is less competitive than system 1 as NI of system 1 is higher (2.4620×10⁶ Yuan/a), PR and IR of system 1 are 1.38 and 0.72 times of system 2, respectively. System 2 is a more environmentally benign system, however, it's not competitive in terms of economy. Thus, economic policy supports should be made available for popularization of system 2 which may include charge for direct waste discharge of untreated or insufficiently treated sewage, and economic compensation for reclaimed water reuse.