Abstract: Ecological expression of raingarden design explores ecological elements and methods of design expression featured rainwater ecology. Ecological processes in raingarden design has been characterized by rainwater treatment and plants in the garden ecosystem, and spiritual ecological process oriented individual perception of rainwater ecology. Based on raingarden works completed recently, pattern of ecological expression for raingarden design is currently framed by ecological elements featured, eco-revelatory design and eco-tech alliance responding to comprehensive ecology.