diff --git a/service/native/src/display_power_mgr_service.cpp b/service/native/src/display_power_mgr_service.cpp
index 2171c34de1151e3550a5c754335596ea9b7b4ade..d4f6542d4f892ea42996f51a00aa099d829c8c35 100644
--- a/service/native/src/display_power_mgr_service.cpp
+++ b/service/native/src/display_power_mgr_service.cpp
@@ -147,6 +147,8 @@ bool DisplayPowerMgrService::DiscountBrightness(double discount, uint32_t displa
     auto safeDiscount = GetSafeDiscount(discount, brightness);
     DISPLAY_HILOGI(FEAT_BRIGHTNESS, "DiscountBrightness displayId=%{public}u, discount-%{public}lf",
                    displayId, safeDiscount);
+    HiviewDFX::HiSysEvent::Write("DISPLAY", "BACKLIGHT_DISCOUNT",
+        HiviewDFX::HiSysEvent::EventType::STATISTIC, "RATIO", safeDiscount);
     return iter->second->DiscountBrightness(safeDiscount);
 }