To　address　the　water　pollution　induced　by　pharmaceuticals,　especially　antibiotics,　and　pathogens,　natural　product　emodin,　a　traditional　Chinese　medicine　with　the　characteristic　large　pi-conjugation　anthraquinone　structure,　was　used　to　rationally　develop　a　novel　Emodin/HAp　photocatalyst　by　integrating　with　a　thermally　stable　and　recyclable　support　material　hydroxyapatite　(HAp)　through　a　simple　preparation　method.　It　was　found　that　its　photocatalytic　activity　to　generate　reactive　oxygen　species　(ROS)　was　greatly　improved　due　to　the　migration　of　photogenerated　electrons　and　holes　between　emodin　and　HAp　upon　visible　light　irradiation.　Thus,　this　Emodin/HAp　photocatalyst　not　only　quickly　photodegraded　tetracycline　with　99.0%　removal　efficiency　but　also　exhibited　complete　photodisinfection　of　pathogenic　bacteria　Staphylococcus　aureus　upon　visible　light　irradiation.　Therefore,　this　study　offers　a　new　route　for　the　design　and　preparation　of　multifunctional　photocatalysts　using　widely　available　natural　products　for　environmental　remediation.