Water　device　is　the　end　of　water　supply　system,　its　water　saving　performance　of　construction　plays　a　key　role　in　the　water　saving　in　building[1].　We　test　the　water-saving　performance　of　various　device　by　the　＇water　saving　performance　testing　device＇　which　is　developed　independently　by　our　group,　analysis　the　flow　characteristics　at　different　conditions.　It　can　apply　view　for　consumers　to　choose　qualified　water-saving　appliances　in　the　future[2].　©　(2014)　Trans　Tech　Publications,　Switzerland.