This paper discusses on the Ecologic al Economics' origin,fundamental issues,discip linary bases,re-search approaches and its orientation.It is argued that the Ecological Economics is a science of sustainable devel-opment.The ecological carrying cap acity and the human' s welfare compose its fundamental is sues.The destination of Ecological Economics is to reach a balance between human' s net spiritual revenue and the lost o f natural capi-tal.The disciplinary bases are exte nsive,inter -disciplinary and dynamic.The methodology evolves from un itary,par-tial and static to inter -disciplinary,aggregative and dynamic.