The　Internet　of　Things　(IoT)-based　health　system　provides　patients　and　doctors　a　lot　of　conveniences,　doctors　can　diagnose　patients　in　time　through　monitored　health　data.　However,　doctors　may　make　a　wrong　diagnosis　of　the　patient＇s　illness,　if　the　health　data　stored　on　the　cloud　is　tampered　or　lost　due　to　an　external　attack　or　power　failure.　Therefore,　it　is　of　great　importance　to　verify　the　integrity　of　the　patient＇s　health　data　stored　on　the　cloud.　Existing　data　integrity　verification　technologies　usually　need　data　owner　to　compute　data　authenticators　for　verification,　but　sensors　on　a　patient　in　IoT-based　health　system　have　limited　computation　ability,　thus　existing　data　integrity　verification　technologies　are　not　very　suitable　in　IoT-based　health　system.　This　paper　proposes　a　lightweight　secure　IoT-based　health　storage　system　to　solve　this　problem.　The　proposed　system　employs　edge　server　to　compute　data　authenticators　and　verify　data　integrity,　greatly　reduces　the　system＇s　computation　cost　and　management　burden　of　third　party　verifier.　Security　analysis　and　performance　evaluation　show　the　proposed　system　is　feasible.　©　2014　IEEE.