Urban agriculture is an important part of making food locally, and it might help make the food chain more resilient in cities. This study used a "farm-to-table" emergy approach to evaluate the environmental sustainability of two representative urban farms, grounded on field research. One is a greenhouse farm in the suburbs that sells food via supermarkets. The other is an aquaponic farm that sends fresh food straight to customers' homes. The findings indicated that, in comparison to conventional greenhouse agriculture, aquaponics farming exhibits a reduced environmental loading ratio and an elevated emergy sustainability index, but necessitating more emergy inputs. The study results will provide scientific references for the future design of urban agriculture, including both production and sales aspects.