diff --git a/Cargo.toml b/Cargo.toml
index 09863f6..3a934de 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,6 +17,7 @@ members = [
     "crates/erp-plugin-itops",
     "crates/erp-health",
     "crates/erp-ai",
+    "crates/erp-plugin-assessment",
 ]
 
 [workspace.package]
diff --git a/crates/erp-plugin-assessment/Cargo.toml b/crates/erp-plugin-assessment/Cargo.toml
new file mode 100644
index 0000000..714e351
--- /dev/null
+++ b/crates/erp-plugin-assessment/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "erp-plugin-assessment"
+version = "0.1.0"
+edition = "2024"
+description = "标准化医学评估量表插件（PHQ-9、GAD-7 等）"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+wit-bindgen = "0.55"
+serde = { workspace = true }
+serde_json = { workspace = true }
diff --git a/crates/erp-plugin-assessment/plugin.toml b/crates/erp-plugin-assessment/plugin.toml
new file mode 100644
index 0000000..22d3da7
--- /dev/null
+++ b/crates/erp-plugin-assessment/plugin.toml
@@ -0,0 +1,149 @@
+# 评估量表 — plugin.toml
+
+[metadata]
+id = "assessment"
+name = "评估量表"
+version = "0.1.0"
+description = "标准化医学评估量表（PHQ-9、GAD-7 等）"
+author = "HMS"
+min_platform_version = "0.1.0"
+
+[[permissions]]
+code = "assessment_scale.list"
+name = "查看评估量表"
+description = "查看评估量表列表和详情"
+
+[[permissions]]
+code = "assessment_scale.manage"
+name = "管理评估量表"
+description = "创建、编辑、删除评估量表"
+
+[[permissions]]
+code = "assessment_response.list"
+name = "查看评估结果"
+description = "查看患者评估答卷"
+
+[[permissions]]
+code = "assessment_response.manage"
+name = "管理评估结果"
+description = "提交、编辑评估答卷"
+
+[[schema.entities]]
+name = "assessment_scale"
+display_name = "评估量表"
+
+[[schema.entities.fields]]
+name = "scale_code"
+field_type = "string"
+required = true
+display_name = "量表编码"
+unique = true
+ui_widget = "select"
+options = ["PHQ-9", "GAD-7", "SF-36", "MMSE", "ADL", "IADL"]
+
+[[schema.entities.fields]]
+name = "title"
+field_type = "string"
+required = true
+display_name = "量表名称"
+searchable = true
+
+[[schema.entities.fields]]
+name = "description"
+field_type = "string"
+display_name = "描述"
+ui_widget = "textarea"
+
+[[schema.entities.fields]]
+name = "questions_json"
+field_type = "json"
+required = true
+display_name = "题目定义（JSON）"
+
+[[schema.entities.fields]]
+name = "scoring_rules_json"
+field_type = "json"
+required = true
+display_name = "评分规则（JSON）"
+
+[[schema.entities.fields]]
+name = "status"
+field_type = "string"
+required = true
+display_name = "状态"
+default = "active"
+ui_widget = "select"
+options = ["active", "inactive"]
+
+[[schema.entities]]
+name = "assessment_response"
+display_name = "评估答卷"
+
+[[schema.entities.fields]]
+name = "scale_id"
+field_type = "uuid"
+required = true
+display_name = "量表"
+ui_widget = "entity_select"
+ref_entity = "assessment_scale"
+ref_plugin = "assessment"
+
+[[schema.entities.fields]]
+name = "patient_id"
+field_type = "uuid"
+required = true
+display_name = "患者 ID"
+
+[[schema.entities.fields]]
+name = "answers_json"
+field_type = "json"
+required = true
+display_name = "答案（JSON）"
+
+[[schema.entities.fields]]
+name = "total_score"
+field_type = "integer"
+required = true
+display_name = "总分"
+
+[[schema.entities.fields]]
+name = "severity_level"
+field_type = "string"
+required = true
+display_name = "严重程度"
+ui_widget = "select"
+options = ["normal", "mild", "moderate", "moderate_severe", "severe"]
+
+[[schema.entities.fields]]
+name = "assessed_by"
+field_type = "uuid"
+display_name = "评估人"
+
+[[schema.entities.fields]]
+name = "status"
+field_type = "string"
+required = true
+display_name = "状态"
+default = "completed"
+ui_widget = "select"
+options = ["draft", "completed", "reviewed"]
+
+[[schema.entities.relations]]
+entity = "assessment_scale"
+foreign_key = "scale_id"
+on_delete = "restrict"
+name = "scale"
+type = "belongs_to"
+display_field = "title"
+
+[[trigger_events]]
+name = "assessment_completed"
+display_name = "评估完成"
+description = "患者完成评估量表，触发评分计算和后续流程"
+entity = "assessment_response"
+on = "create"
+
+[[ui.pages]]
+type = "crud"
+label = "评估量表"
+icon = "FormOutlined"
diff --git a/crates/erp-plugin-assessment/src/lib.rs b/crates/erp-plugin-assessment/src/lib.rs
new file mode 100644
index 0000000..b09fde2
--- /dev/null
+++ b/crates/erp-plugin-assessment/src/lib.rs
@@ -0,0 +1,145 @@
+//! 评估量表插件 — 标准化医学评估（PHQ-9, GAD-7 等）
+
+use serde_json::json;
+
+wit_bindgen::generate!({
+    path: "../erp-plugin-prototype/wit/plugin.wit",
+    world: "plugin-world",
+});
+
+use crate::erp::plugin::host_api;
+use crate::exports::erp::plugin::plugin_api::Guest;
+
+struct AssessmentPlugin;
+
+impl Guest for AssessmentPlugin {
+    fn init() -> Result<(), String> {
+        host_api::log_write("info", "AssessmentPlugin initialized");
+        Ok(())
+    }
+
+    fn on_tenant_created(tenant_id: String) -> Result<(), String> {
+        host_api::log_write(
+            "info",
+            &format!("AssessmentPlugin: tenant {} created, inserting default scales", tenant_id),
+        );
+
+        insert_phq9_scale(&tenant_id)?;
+
+        Ok(())
+    }
+
+    fn handle_event(event_type: String, payload: Vec<u8>) -> Result<(), String> {
+        host_api::log_write(
+            "debug",
+            &format!("AssessmentPlugin received: {}", event_type),
+        );
+
+        if event_type == "assessment_completed" {
+            let data: serde_json::Value =
+                serde_json::from_slice(&payload).map_err(|e| format!("解析失败: {}", e))?;
+            host_api::log_write(
+                "info",
+                &format!("评估完成: scale_id={}, patient_id={}",
+                    data["scale_id"].as_str().unwrap_or("?"),
+                    data["patient_id"].as_str().unwrap_or("?")
+                ),
+            );
+        }
+
+        Ok(())
+    }
+}
+
+/// 插入 PHQ-9 抑郁筛查量表默认数据
+fn insert_phq9_scale(tenant_id: &str) -> Result<(), String> {
+    let questions = json!([
+        {"id": 1, "text": "做事时提不起劲或没有兴趣", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 2, "text": "感到心情低落、沮丧或绝望", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 3, "text": "入睡困难、睡不安稳或睡眠过多", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 4, "text": "感觉疲倦或没有活力", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 5, "text": "食欲不振或吃太多", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 6, "text": "觉得自己很糟，或觉得自己失败了，或让自己和家人失望", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 7, "text": "对事物专注有困难（例如阅读或看电视）", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 8, "text": "动作或说话速度缓慢到别人可以察觉，或正好相反——烦躁不安地动来动去", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]},
+        {"id": 9, "text": "有不如死掉或者用某种方式伤害自己的念头", "options": [
+            {"label": "完全不会", "score": 0},
+            {"label": "好几天", "score": 1},
+            {"label": "一半以上的天数", "score": 2},
+            {"label": "几乎每天", "score": 3}
+        ]}
+    ]);
+
+    let scoring_rules = json!([
+        {"min": 0, "max": 4, "level": "normal", "label": "无抑郁症状"},
+        {"min": 5, "max": 9, "level": "mild", "label": "轻度抑郁"},
+        {"min": 10, "max": 14, "level": "moderate", "label": "中度抑郁"},
+        {"min": 15, "max": 19, "level": "moderate_severe", "label": "中重度抑郁"},
+        {"min": 20, "max": 27, "level": "severe", "label": "重度抑郁"}
+    ]);
+
+    let data = json!({
+        "scale_code": "PHQ-9",
+        "title": "PHQ-9 患者健康问卷（抑郁筛查）",
+        "description": "Patient Health Questionnaire-9，用于抑郁症状筛查和严重程度评估",
+        "questions_json": questions,
+        "scoring_rules_json": scoring_rules,
+        "status": "active",
+        "tenant_id": tenant_id,
+    });
+
+    let result = host_api::db_insert("assessment_scale", data.to_string().as_bytes())
+        .map_err(|e| format!("插入 PHQ-9 默认量表失败: {}", e))?;
+
+    let record: serde_json::Value =
+        serde_json::from_slice(&result).map_err(|e| format!("解析结果失败: {}", e))?;
+
+    host_api::log_write(
+        "info",
+        &format!("PHQ-9 默认量表已创建: id={}", record["id"].as_str().unwrap_or("?")),
+    );
+
+    Ok(())
+}
+
+export!(AssessmentPlugin);