The　center-hung　scoreboard　is　a　large　electronic　display　device,　that　usually　has　a　significant　weight　and　is　flexibly　suspended　from　the　roof　of　the　gymnasium.　The　suspen-dome　structure　is　one　of　the　common　roof　structures　of　gymnasiums.　In　order　to　investigate　the　effect　of　the　center-hung　scoreboard　on　the　natural　vibration　characteristics　and　seismic　response,　including　acceleration,　displacement,　and　strain,　of　the　suspen-dome　structure　and　considering　that　the　dynamic　behavior　of　the　structure　under　seismic　action　can　be　realistically　reflected,　a　shaking　table　test　was　carried　out　based　on　the　suspen-dome　structure　of　the　Gymnasium　of　the　Lanzhou　Olympic　Sports　Center.　Firstly,　according　to　the　size　of　the　shaking　table,　a　dynamic　scale　model　with　a　geometric　similarity　ratio　of　1:20　was　established.　After　that,　the　white　noise　excitation　test　and　numerical　modal　analysis　were　conducted　on　the　models　with　and　without　the　center-hung　scoreboard　to　compare　the　two　modes＇　natural　vibration　characteristics.　Furthermore,　the　earthquake　simulation　test　was　carried　out　on　the　models　with　and　without　a　center-hung　scoreboard,　and　their　various　seismic　responses,　including　acceleration,　displacement,　and　strain,　were　compared　and　analyzed.　Finally,　the　acceleration　response　and　displacement　response　of　the　center-hung　scoreboard　were　investigated.　The　results　show　that　the　higher-order　natural　frequencies　of　the　suspen-dome　structure　will　increase　when　the　center-hung　scoreboard　is　suspended　from　the　roof,　and　the　swing　of　the　center-hung　scoreboard　will　be　excited　first　in　the　low-order　mode.　In　addition,　the　various　seismic　responses,　including　acceleration,　displacement,　and　strain,　of　the　model　with　the　center-hung　scoreboard　are　all　increased　compared　to　the　model　without　the　center-hung　scoreboard.　Meanwhile,　the　influence　of　the　center-hung　scoreboard　on　the　seismic　response　of　the　suspen-dome　structure　decreases　from　the　inner　ring　to　the　outer　ring　of　the　structure.　Moreover,　under　the　action　of　an　earthquake,　the　acceleration　response　and　displacement　response　of　the　center-hung　scoreboard　are　both　extremely　high.　Considering　the　center-hung　scoreboard　in　the　analysis　and　design　stage　of　the　suspen-dome　structure　is　necessary.