diff --git a/plugins/CMakeLists.txt b/plugins/CMakeLists.txt
index ac9c549..b677cb8 100644
--- a/plugins/CMakeLists.txt
+++ b/plugins/CMakeLists.txt
@@ -458,6 +458,18 @@ set_target_properties(logic_gate PROPERTIES
     RUNTIME_OUTPUT_DIRECTORY ${RK_PLUGIN_OUTPUT_DIR}
 )
 
+# region_event plugin (rule-driven region behavior events)
+add_library(region_event SHARED
+    region_event/region_event_node.cpp
+)
+target_include_directories(region_event PRIVATE ${CMAKE_SOURCE_DIR}/include ${CMAKE_SOURCE_DIR}/third_party)
+target_link_libraries(region_event PRIVATE project_options Threads::Threads)
+set_target_properties(region_event PROPERTIES
+    OUTPUT_NAME "region_event"
+    LIBRARY_OUTPUT_DIRECTORY ${RK_PLUGIN_OUTPUT_DIR}
+    RUNTIME_OUTPUT_DIRECTORY ${RK_PLUGIN_OUTPUT_DIR}
+)
+
 # storage plugin (continuous recording with segment management)
 add_library(storage SHARED
     storage/storage_node.cpp
@@ -529,7 +541,7 @@ set_target_properties(ai_shoe_det PROPERTIES
     RUNTIME_OUTPUT_DIRECTORY ${RK_PLUGIN_OUTPUT_DIR}
 )
 
-install(TARGETS input_rtsp input_file publish preprocess ai_yolo ai_face_det ai_scrfd ai_scrfd_sliding ai_face_recog tracker gate osd alarm logic_gate storage ai_scheduler ai_shoe_det
+install(TARGETS input_rtsp input_file publish preprocess ai_yolo ai_face_det ai_scrfd ai_scrfd_sliding ai_face_recog tracker gate osd alarm logic_gate region_event storage ai_scheduler ai_shoe_det
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/rk3588-media-server/plugins
     RUNTIME DESTINATION ${CMAKE_INSTALL_LIBDIR}/rk3588-media-server/plugins
 )
diff --git a/plugins/region_event/region_event_node.cpp b/plugins/region_event/region_event_node.cpp
new file mode 100644
index 0000000..dc3fb39
--- /dev/null
+++ b/plugins/region_event/region_event_node.cpp
@@ -0,0 +1,232 @@
+#include "region_event_node.h"
+
+#include <algorithm>
+#include <cstdint>
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "behavior/behavior_event.h"
+#include "utils/logger.h"
+
+namespace rk3588 {
+namespace {
+
+enum class RegionEventKind {
+    Intrusion,
+    Climb
+};
+
+struct NormalizedLine {
+    float x1 = 0.0f;
+    float y1 = 0.0f;
+    float x2 = 0.0f;
+    float y2 = 0.0f;
+};
+
+struct RegionEventRule {
+    RegionEventKind kind = RegionEventKind::Intrusion;
+    std::string region_id;
+    Rect roi{};
+    NormalizedLine line{};
+    uint64_t min_duration_ms = 0;
+    float min_vertical_motion = 0.0f;
+};
+
+struct TrackState {
+    Rect bbox{};
+    uint64_t pts = 0;
+};
+
+static bool ParseRules(const SimpleJson& config, std::vector<RegionEventRule>& out, std::string& err) {
+    const SimpleJson* events = config.Find("events");
+    if (!events || !events->IsArray()) {
+        err = "events must be array";
+        return false;
+    }
+
+    out.clear();
+    for (const auto& ev : events->AsArray()) {
+        if (!ev.IsObject()) {
+            err = "event entry must be object";
+            return false;
+        }
+
+        RegionEventRule rule;
+        const std::string type = ev.ValueOr<std::string>("type", "");
+        rule.region_id = ev.ValueOr<std::string>("region_id", "");
+        rule.min_duration_ms = static_cast<uint64_t>(std::max(0, ev.ValueOr<int>("min_duration_ms", 0)));
+
+        if (type == "intrusion") {
+            const SimpleJson* roi = ev.Find("roi");
+            if (!roi || !roi->IsObject()) {
+                err = "intrusion event requires roi";
+                return false;
+            }
+            rule.kind = RegionEventKind::Intrusion;
+            rule.roi.x = roi->ValueOr<float>("x", 0.0f);
+            rule.roi.y = roi->ValueOr<float>("y", 0.0f);
+            rule.roi.w = roi->ValueOr<float>("w", 0.0f);
+            rule.roi.h = roi->ValueOr<float>("h", 0.0f);
+        } else if (type == "climb") {
+            const SimpleJson* line = ev.Find("line");
+            if (!line || !line->IsObject()) {
+                err = "climb event requires line";
+                return false;
+            }
+            rule.kind = RegionEventKind::Climb;
+            rule.line.x1 = line->ValueOr<float>("x1", 0.0f);
+            rule.line.y1 = line->ValueOr<float>("y1", 0.0f);
+            rule.line.x2 = line->ValueOr<float>("x2", 0.0f);
+            rule.line.y2 = line->ValueOr<float>("y2", 0.0f);
+            rule.min_vertical_motion = ev.ValueOr<float>("min_vertical_motion", 0.0f);
+        } else {
+            err = "unsupported event type: " + type;
+            return false;
+        }
+
+        out.push_back(std::move(rule));
+    }
+    return true;
+}
+
+static float CenterX(const Rect& rect) {
+    return rect.x + (rect.w * 0.5f);
+}
+
+static float CenterY(const Rect& rect) {
+    return rect.y + (rect.h * 0.5f);
+}
+
+static bool IsInsideNormalizedRoi(const Rect& bbox, const Rect& roi, int img_w, int img_h) {
+    if (img_w <= 0 || img_h <= 0) return false;
+    const float cx = CenterX(bbox) / static_cast<float>(img_w);
+    const float cy = CenterY(bbox) / static_cast<float>(img_h);
+    return cx >= roi.x && cx <= (roi.x + roi.w) && cy >= roi.y && cy <= (roi.y + roi.h);
+}
+
+static bool CrossedHorizontalLine(const Rect& previous, const Rect& current, const RegionEventRule& rule, int img_h) {
+    if (img_h <= 0) return false;
+    const float line_y = rule.line.y1 * static_cast<float>(img_h);
+    const float previous_top = previous.y;
+    const float current_top = current.y;
+    return previous_top > line_y &&
+           current_top <= line_y &&
+           (previous_top - current_top) >= rule.min_vertical_motion;
+}
+
+static BehaviorEventType ToBehaviorEventType(RegionEventKind kind) {
+    return kind == RegionEventKind::Intrusion ? BehaviorEventType::Intrusion : BehaviorEventType::Climb;
+}
+
+}  // namespace
+
+struct RegionEventNode::Impl {
+    std::string init_err;
+    std::vector<RegionEventRule> rules;
+    std::map<int, TrackState> track_history;
+};
+
+RegionEventNode::RegionEventNode() : impl_(std::make_unique<Impl>()) {}
+
+RegionEventNode::~RegionEventNode() = default;
+
+std::string RegionEventNode::Id() const {
+    return id_;
+}
+
+std::string RegionEventNode::Type() const {
+    return "region_event";
+}
+
+bool RegionEventNode::Init(const SimpleJson& config, const NodeContext& ctx) {
+    id_ = config.ValueOr<std::string>("id", "region_event");
+    if (!ParseRules(config, impl_->rules, impl_->init_err)) {
+        LogError("[region_event] invalid config: " + impl_->init_err);
+        return false;
+    }
+    output_queues_ = ctx.output_queues;
+    return true;
+}
+
+bool RegionEventNode::Start() {
+    return true;
+}
+
+void RegionEventNode::Stop() {}
+
+NodeStatus RegionEventNode::Process(FramePtr frame) {
+    if (!frame) return NodeStatus::DROP;
+
+    EnsureBehaviorEvents(*frame);
+    if (!frame->det) {
+        PushToDownstream(frame);
+        return NodeStatus::OK;
+    }
+
+    const int img_w = frame->det->img_w > 0 ? frame->det->img_w : frame->width;
+    const int img_h = frame->det->img_h > 0 ? frame->det->img_h : frame->height;
+
+    for (const auto& det : frame->det->items) {
+        if (det.track_id < 0) continue;
+
+        for (const auto& rule : impl_->rules) {
+            if (rule.kind == RegionEventKind::Intrusion) {
+                if (!IsInsideNormalizedRoi(det.bbox, rule.roi, img_w, img_h)) continue;
+
+                BehaviorEventItem event;
+                event.type = ToBehaviorEventType(rule.kind);
+                event.status = BehaviorEventStatus::Active;
+                event.score = det.score;
+                event.bbox = det.bbox;
+                event.track_ids.push_back(det.track_id);
+                event.start_pts = frame->pts;
+                event.last_pts = frame->pts;
+                event.duration_ms = rule.min_duration_ms;
+                event.source = "region_event";
+                event.region_id = rule.region_id;
+                frame->behavior_events->items.push_back(std::move(event));
+            } else {
+                auto it = impl_->track_history.find(det.track_id);
+                if (it == impl_->track_history.end()) continue;
+                if (!CrossedHorizontalLine(it->second.bbox, det.bbox, rule, img_h)) continue;
+
+                BehaviorEventItem event;
+                event.type = ToBehaviorEventType(rule.kind);
+                event.status = BehaviorEventStatus::Active;
+                event.score = det.score;
+                event.bbox = det.bbox;
+                event.track_ids.push_back(det.track_id);
+                event.start_pts = it->second.pts;
+                event.last_pts = frame->pts;
+                event.duration_ms = frame->pts >= it->second.pts ? (frame->pts - it->second.pts) : 0;
+                event.source = "region_event";
+                event.region_id = rule.region_id;
+                frame->behavior_events->items.push_back(std::move(event));
+            }
+        }
+
+        impl_->track_history[det.track_id] = TrackState{det.bbox, frame->pts};
+    }
+
+    PushToDownstream(frame);
+    return NodeStatus::OK;
+}
+
+void RegionEventNode::EnsureBehaviorEvents(Frame& frame) {
+    if (!frame.behavior_events) {
+        frame.behavior_events = std::make_shared<BehaviorEventResult>();
+    }
+}
+
+void RegionEventNode::PushToDownstream(const FramePtr& frame) {
+    for (auto& q : output_queues_) {
+        if (q) q->Push(frame);
+    }
+}
+
+REGISTER_NODE(RegionEventNode, "region_event");
+
+}  // namespace rk3588
diff --git a/plugins/region_event/region_event_node.h b/plugins/region_event/region_event_node.h
new file mode 100644
index 0000000..8106523
--- /dev/null
+++ b/plugins/region_event/region_event_node.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "node.h"
+
+namespace rk3588 {
+
+class RegionEventNode final : public INode {
+public:
+    RegionEventNode();
+    ~RegionEventNode() override;
+
+    std::string Id() const override;
+    std::string Type() const override;
+    bool Init(const SimpleJson& config, const NodeContext& ctx) override;
+    bool Start() override;
+    void Stop() override;
+    NodeStatus Process(FramePtr frame) override;
+
+private:
+    void EnsureBehaviorEvents(Frame& frame);
+    void PushToDownstream(const FramePtr& frame);
+
+    struct Impl;
+    std::unique_ptr<Impl> impl_;
+    std::string id_;
+    std::vector<std::shared_ptr<SpscQueue<FramePtr>>> output_queues_;
+};
+
+}  // namespace rk3588
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 306127d..772f1e6 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -38,6 +38,7 @@ add_executable(rk3588_gtests
     test_hw_factory.cpp
     test_frame_buffer.cpp
     test_behavior_event_model.cpp
+    test_region_event.cpp
     test_infer_backend.cpp
     test_image_processor.cpp
     test_codec_backend.cpp
@@ -47,6 +48,7 @@ add_executable(rk3588_gtests
     ${CMAKE_SOURCE_DIR}/src/ai_scheduler.cpp
     ${CMAKE_SOURCE_DIR}/src/utils/config_expand.cpp
     ${CMAKE_SOURCE_DIR}/src/utils/dma_alloc.cpp
+    ${CMAKE_SOURCE_DIR}/plugins/region_event/region_event_node.cpp
 )
 
 target_include_directories(rk3588_gtests PRIVATE
diff --git a/tests/test_region_event.cpp b/tests/test_region_event.cpp
new file mode 100644
index 0000000..b2fce59
--- /dev/null
+++ b/tests/test_region_event.cpp
@@ -0,0 +1,113 @@
+#include <gtest/gtest.h>
+
+#include <memory>
+#include <string>
+
+#include "frame/frame.h"
+#include "node.h"
+#include "utils/simple_json.h"
+#include "../plugins/region_event/region_event_node.h"
+
+namespace rk3588 {
+namespace {
+
+SimpleJson ParseConfigText(const std::string& text) {
+    SimpleJson config;
+    std::string err;
+    EXPECT_TRUE(ParseSimpleJson(text, config, err)) << err;
+    return config;
+}
+
+TEST(RegionEventTest, EmitsIntrusionWhenTrackedPersonStaysInsideRegion) {
+    RegionEventNode node;
+
+    const std::string config_text = R"({
+        "id": "region_evt",
+        "events": [
+            {
+                "type": "intrusion",
+                "region_id": "zone_a",
+                "roi": {"x": 0.10, "y": 0.10, "w": 0.50, "h": 0.50},
+                "min_duration_ms": 0
+            }
+        ]
+    })";
+
+    SimpleJson config = ParseConfigText(config_text);
+    NodeContext ctx;
+    auto out = std::make_shared<SpscQueue<FramePtr>>(4, QueueDropStrategy::DropOldest);
+    ctx.output_queues.push_back(out);
+
+    ASSERT_TRUE(node.Init(config, ctx));
+    ASSERT_TRUE(node.Start());
+
+    auto frame = std::make_shared<Frame>();
+    frame->width = 1920;
+    frame->height = 1080;
+    frame->pts = 1000;
+    frame->det = std::make_shared<DetectionResult>();
+    frame->det->img_w = 1920;
+    frame->det->img_h = 1080;
+    frame->det->items.push_back(Detection{0, 0.95f, Rect{300.0f, 220.0f, 180.0f, 420.0f}, 42});
+
+    EXPECT_EQ(static_cast<int>(node.Process(frame)), static_cast<int>(NodeStatus::OK));
+    ASSERT_NE(frame->behavior_events, nullptr);
+    ASSERT_EQ(frame->behavior_events->items.size(), 1u);
+    EXPECT_EQ(frame->behavior_events->items[0].type, BehaviorEventType::Intrusion);
+    ASSERT_EQ(frame->behavior_events->items[0].track_ids.size(), 1u);
+    EXPECT_EQ(frame->behavior_events->items[0].track_ids[0], 42);
+}
+
+TEST(RegionEventTest, EmitsClimbWhenTrackCrossesBoundaryOverTime) {
+    RegionEventNode node;
+
+    const std::string config_text = R"({
+        "id": "region_evt",
+        "events": [
+            {
+                "type": "climb",
+                "region_id": "fence_1",
+                "line": {"x1": 0.20, "y1": 0.40, "x2": 0.80, "y2": 0.40},
+                "min_duration_ms": 0,
+                "min_vertical_motion": 40
+            }
+        ]
+    })";
+
+    SimpleJson config = ParseConfigText(config_text);
+    NodeContext ctx;
+    auto out = std::make_shared<SpscQueue<FramePtr>>(4, QueueDropStrategy::DropOldest);
+    ctx.output_queues.push_back(out);
+
+    ASSERT_TRUE(node.Init(config, ctx));
+    ASSERT_TRUE(node.Start());
+
+    auto frame1 = std::make_shared<Frame>();
+    frame1->width = 1920;
+    frame1->height = 1080;
+    frame1->pts = 1000;
+    frame1->det = std::make_shared<DetectionResult>();
+    frame1->det->img_w = 1920;
+    frame1->det->img_h = 1080;
+    frame1->det->items.push_back(Detection{0, 0.90f, Rect{700.0f, 520.0f, 120.0f, 260.0f}, 7});
+
+    auto frame2 = std::make_shared<Frame>();
+    frame2->width = 1920;
+    frame2->height = 1080;
+    frame2->pts = 1100;
+    frame2->det = std::make_shared<DetectionResult>();
+    frame2->det->img_w = 1920;
+    frame2->det->img_h = 1080;
+    frame2->det->items.push_back(Detection{0, 0.92f, Rect{700.0f, 320.0f, 120.0f, 260.0f}, 7});
+
+    EXPECT_EQ(static_cast<int>(node.Process(frame1)), static_cast<int>(NodeStatus::OK));
+    EXPECT_EQ(static_cast<int>(node.Process(frame2)), static_cast<int>(NodeStatus::OK));
+    ASSERT_NE(frame2->behavior_events, nullptr);
+    ASSERT_EQ(frame2->behavior_events->items.size(), 1u);
+    EXPECT_EQ(frame2->behavior_events->items[0].type, BehaviorEventType::Climb);
+    ASSERT_EQ(frame2->behavior_events->items[0].track_ids.size(), 1u);
+    EXPECT_EQ(frame2->behavior_events->items[0].track_ids[0], 7);
+}
+
+}  // namespace
+}  // namespace rk3588