An　algorithm　for　watermark　based　on　space-domain　and　transform-domain　is　described　in　the　paper.　Making　use　of　the　different　characteristic　of　spatial　domain　and　transform　domain,　the　conflict　between　invisibility　and　robust　in　the　algorithm　for　watermark　can　be　prevented,　and　the　density　of　embedded　watermark　can　be　increased.　In　the　first　stage　of　the　proposed　method,　the　unessential　parts　of　the　watermark　are　embedded　to　the　host　image　by　LSB　algorithm　in　spatial　domain.　After　that,　the　image　is　converted　to　frequency　domain　with　wavelet　packet　transform　and　the　significant　parts　of　the　watermark　are　embedded　to　the　significant　coefficients.　With　this　scheme,　more　watermark　data　can　be　embedded　to　the　host　image　and　the　watermark　data　won＇t　be　easily　distorted.　From　the　simulation　results,　we　can　see　that　the　approach　has　good　performance　and　robust　to　the　crop　and　noise　attack.　©　2019　IEEE.