A　novel　integrated　sensor　structure　is　presented　for　detecting　defect　and　measuring　stress　level　of　ferromagnetic　material　waveguides　while　it　works　as　magnetostrictive　sensor　(MsS)　and　elastomagnetic　sensor　(EMS)　alternatively.　This　dual-mode　integrated　sensor　includes　bias　magnetic　circuit　and　inner-,　outer-sensing　coil.　According　to　the　basic　theory　of　magnetostrictive　and　elastomagnetic　effect,　the　bias　magnetic　circuit　is　optimized　using　finite　element　method　in　which　the　energy　conversion　efficiency　and　stress　measurement　sensitivity　are　estimated　as　the　criterion　of　sensor　performance.　When　the　integrated　sensor　works　as　MsS,　the　experimental　results　show　that　it　can　excite　L(0,1)　mode　guided　wave　in　a　6.3　mm　diameter　steel　rod　to　detect　a　notch　of　1　mm　in　both　depth　and　width.　The　defect　detection　capability　can　be　enhanced　by　increasing　the　current　flowing　through　the　outer　sensing　coil.　When　the　integrated　sensor　works　as　EMS,　its　stress　measurement　sensitivity　and　the　linearity　of　measured　curves　can　be　improved　by　increasing　the　excitation　signal　amplitude.　The　highest　linear　regression　coefficient　of　measured　curve　reaches　0.9924,　so　that　the　presented　integrated　sensor　can　be　applied　for　highly　precise　stress　measurement.