Abstract
Many types of artificial reefs have been developed and settled to create fishery ground for the production enhancement in marine areas. There are many issues to be clarified about the suitable installation of artificial reefs, such as the relation between flow conditions and the biological effect of them. In this paper, a set of technologies newly developed to restore marine biological environment is introduced. It consists of a numerical simulation to select out the most appropriate area for marine habitat restoration and a new artificial reef that embodies multiple functions. The set of technologies was applied to two coastal areas of different characteristics and was verified to improve biological environment.