Understanding　the　internal　magnetization　structure　of　an　individual　ferromagnetic　nanoparticle　(MNP)　is　crucial　for　deciphering　its　magnetic　characteristics.　Unfortunately,　while　certain　techniques　can　measure　the　magnetic　properties　of　an　individual　MNP,　they　fall　short　of　accurately　detecting　the　internal　magnetization　structure.　In　this　work,　micromagnetic　simulations　were　employed　to　construct　the　internal　magnetization　structure　of　an　individual　CoFe2O4　(CFO)　nanopyramid,　and　the　energy　jump　behavior　during　the　magnetization　process　was　successfully　explained,　with　simulation　results　aligning　with　dynamic　cantilever　magnetometry　(DCM)　experimental　outcomes.　Subsequently,　the　external　stray　field　of　the　nanopyramid　was　simulated,　and　the　stray　field　gradient　map　revealed　distinct　bright　and　dark　regions　corresponding　to　the　reverse　and　forward　saturation　magnetizations　of　the　CFO　nanopyramid.　This　result　is　possible　to　be　verified　by　magnetic　force　microscopy　(MFM)　measurements　of　individual　CFO　nanopyramids.　The　confidence　in　the　accuracy　of　the　simulated　internal　magnetization　structure　was　significantly　enhanced　by　independently　verifying　the　micromagnetic　simulation　results　through　DCM　and　MFM　experiments.　Our　work　proposes　a　convenient　and　cost-effective　method　for　studying　the　internal　magnetization　structure　of　individual　MNPs.　©　2024　Author(s).