In　this　study,　eco-friendly　and　magnetic　sucrose-derived　Fe-containing　mesoporous　carbon　(Fe-MC)　composites　have　been　prepared　by　carbothermal　reduction.　The　Fe-MC3-1000　prepared　from　sucrose　and　FeSO4　with　a　mass　ratio　of　1:1　at　1000　°C　has　a　uniform　mesoporous　structure　with　a　BET　surface　area　of　184　m2/g.　The　carbothermal　reduction　of　Fe2O3　had　dual　effects　of　the　pore-forming　and　the　loading.　Batch　adsorption　experiments　and　electrochemical　measurements　show　that　the　Fe-MC3-1000　has　the　optimum　performance　in　both　adsorption　and　supercapacitor　applications.　For　adsorption,　the　maximum　adsorption　capacity　for　Congo　red　(CR)　arrived　at　972.1　mg　g−1　with　a　removal　percentage　of　97.2　%.　The　adsorption　process　has　good　agreement　with　Langmuir　isotherm　and　Elovich　kinetic　models.　Besides,　the　Fe-MC3-1000　exhibits　good　recyclability　after　five　adsorption-desorption　cycles.　For　supercapacitor,　the　Fe-MC3-1000　electrode　has　a　capacitance　value　of　179.23　F　g−1　and　a　capacitance　retention　of　92.8　%　at　10　A　g−1　after　2000　cycles.　The　outstanding　adsorption　and　electrochemical　performances　suggest　that　the　Fe-MC3-1000　is　a　competitive　bi-functional　material　for　adsorption　and　supercapacitor.　©　2023　Elsevier　B.V.