Wastewater-containing　industrial　dyes　are　quite　harmful　since　most　dyes　are　stable　and　toxic　to　humans.　Detection　and　removing　of　those　dyes　from　wastewater　is　necessary　to　ensure　water　supply　safety.　In　present　work,　a　nitrated　cellulose　acetate　(NCA)　microfiltration　membrane　was　developed　for　specific　absorption　and　visible　detection　of　methylene　blue　(MB).　The　NCA　microfiltration　membrane　overcomes　the　defect　of　high　driven　pressure　in　nanofiltration　or　ultrafiltration　process.　By　absorption　effect,　the　NCA　membrane　also　overcomes　the　defect　of　low　retention　rate　of　traditional　microfiltration　membrane　to　dyes.　The　residual　MB　can　be　removed　quickly　and　thoroughly　by　microfiltration　absorption.　The　microfiltration　membrane　can　also　be　used　for　visual　detection　of　MB　by　concentrating　the　MB　on　membrane.　The　limit　of　detection　is　as　low　as　0.001　mg/L.　The　detection　method　is　simple　and　free　of　large-scale　instrument,　and　can　be　used　as　a　portable　device　for　spot　detection　of　dye-contaminated　water.　©　2016,　Korean　Institute　of　Chemical　Engineers,　Seoul,　Korea.