diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/ClusterEntity.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/ClusterEntity.java
new file mode 100644
index 0000000000..bbad3d2bbd
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/ClusterEntity.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 集群实体
+ *
+ * @author xuezechao
+ * @since 2023-03-02
+ */
+@Getter
+@Setter
+public class ClusterEntity {
+    String cluster;
+}
diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EnvironmentEntity.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EnvironmentEntity.java
new file mode 100644
index 0000000000..6f94e793d4
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EnvironmentEntity.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 环境实体
+ *
+ * @author xuezechao
+ * @since 2023-03-02
+ */
+@Getter
+@Setter
+public class EnvironmentEntity {
+    String env;
+}
diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventInfoEntity.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventInfoEntity.java
new file mode 100644
index 0000000000..0d2ea306a5
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventInfoEntity.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 事件实体
+ *
+ * @since 2023-03-02
+ * @author xuezechao
+ */
+@Getter
+@Setter
+public class EventInfoEntity {
+    /**
+     * 实例元数据hash
+     */
+    private String meta;
+
+    /**
+     * 触发时间
+     */
+    private long time;
+
+    /**
+     * 事件区域
+     */
+    private String scope;
+
+    /**
+     * 事件等级
+     */
+    private EventLevel level;
+
+    /**
+     * 事件类型
+     */
+    private EventType type;
+
+    /**
+     * 事件信息
+     */
+    private EventMessageEntity info;
+}
diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventLevel.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventLevel.java
new file mode 100644
index 0000000000..d6a81036a5
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventLevel.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+/**
+ * 事件等级
+ *
+ * @author xuezechao
+ * @since 2023-03-02
+ */
+public enum EventLevel {
+
+    /**
+     * 紧急
+     */
+    EMERGENCY(300),
+
+    /**
+     * 重要
+     */
+    IMPORTANT(200),
+
+    /**
+     * 一般
+     */
+    NORMAL(100);
+
+    private final int levelThreshold;
+
+    EventLevel(int levelThreshold) {
+        this.levelThreshold = levelThreshold;
+    }
+
+    public int getLevelThreshold() {
+        return levelThreshold;
+    }
+}
diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventMessageEntity.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventMessageEntity.java
new file mode 100644
index 0000000000..0f35164896
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventMessageEntity.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 事件信息
+ *
+ * @author xuezechao
+ * @since 2023-03-02
+ */
+@Getter
+@Setter
+public class EventMessageEntity {
+    private String name;
+    private String description;
+}
diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventType.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventType.java
new file mode 100644
index 0000000000..f145eab518
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/EventType.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+/**
+ * 事件类型
+ *
+ * @author xuezechao
+ * @since 2023-03-02
+ */
+public enum EventType {
+    /**
+     * 运行事件
+     */
+    OPERATION(0, "operation"),
+
+    /**
+     * 治理事件
+     */
+    GOVERNANCE(1, "governance"),
+
+    /**
+     * 日志事件
+     */
+    LOG(2, "log");
+
+    private final int type;
+
+    private final String description;
+
+    EventType(int type, String description) {
+        this.type = type;
+        this.description = description;
+    }
+
+    public int getType() {
+        return type;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/InstanceMeta.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/InstanceMeta.java
new file mode 100644
index 0000000000..a21ad06766
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/InstanceMeta.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 事件元数据
+ *
+ * @author xuezechao
+ * @since 2023-03-02
+ */
+@Getter
+@Setter
+public class InstanceMeta {
+
+    /**
+     * 实例原数据哈希
+     */
+    private String metaHash;
+
+    /**
+     * 实例ID
+     */
+    private String instanceId;
+
+    /**
+     * 应用
+     */
+    private String application;
+
+    /**
+     * 节点
+     */
+    private NodeEntity node;
+
+    /**
+     * 集群
+     */
+    private ClusterEntity cluster;
+
+    /**
+     * 环境
+     */
+    private EnvironmentEntity environment;
+
+    /**
+     * 可用区
+     */
+    private String az;
+}
diff --git a/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/NodeEntity.java b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/NodeEntity.java
new file mode 100644
index 0000000000..d5c9b3b5b3
--- /dev/null
+++ b/sermant-backend/src/main/java/com/huaweicloud/sermant/backend/entity/NodeEntity.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2023-2023 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.huaweicloud.sermant.backend.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 实例节点数据
+ *
+ * @author xuezechao
+ * @since 2023-03-02
+ */
+@Getter
+@Setter
+public class NodeEntity {
+
+    /**
+     * 实例ip
+     */
+    private String ip;
+}