This paper tries to give an overview on technologies using fibrous materials for contributing to environmental and resource matters. The technologies for water treatment include bio-reactive treatment system using membrane hollow fibre, desalination using Ro hollow fibre, purification of water work using UF or MF hollow fibre, purification of recycled water using photo-catalyst fibre, and oil removal systems using micro-fibre nonwoven. Removal system for incineration dust using bag filter, and removal system for toxic gas and solvent recovery using activated carbon fibre are typical...