diff --git a/crates/erp-ai/src/service/usage.rs b/crates/erp-ai/src/service/usage.rs
index 1c20d4b..644631d 100644
--- a/crates/erp-ai/src/service/usage.rs
+++ b/crates/erp-ai/src/service/usage.rs
@@ -1,7 +1,7 @@
-use sea_orm::ActiveModelTrait;
-use sea_orm::Set;
+use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, FromQueryResult, QueryFilter, QuerySelect, Set};
 use uuid::Uuid;
 
+use crate::entity::ai_analysis;
 use crate::entity::ai_usage;
 use crate::error::AiResult;
 
@@ -42,4 +42,46 @@ impl UsageService {
         };
         Ok(active.insert(&self.db).await?)
     }
+
+    /// 用量概览
+    pub async fn get_overview(&self, tenant_id: Uuid) -> AiResult<UsageOverview> {
+        let result = ai_analysis::Entity::find()
+            .filter(ai_analysis::Column::TenantId.eq(tenant_id))
+            .filter(ai_analysis::Column::Status.eq("completed"))
+            .filter(ai_analysis::Column::DeletedAt.is_null())
+            .select_only()
+            .column_as(ai_analysis::Column::Id.count(), "total_count")
+            .into_model::<UsageOverview>()
+            .one(&self.db)
+            .await?
+            .unwrap_or(UsageOverview { total_count: 0 });
+        Ok(result)
+    }
+
+    /// 按分析类型统计
+    pub async fn get_by_type(&self, tenant_id: Uuid) -> AiResult<Vec<TypeCount>> {
+        let result = ai_analysis::Entity::find()
+            .filter(ai_analysis::Column::TenantId.eq(tenant_id))
+            .filter(ai_analysis::Column::Status.eq("completed"))
+            .filter(ai_analysis::Column::DeletedAt.is_null())
+            .select_only()
+            .column(ai_analysis::Column::AnalysisType)
+            .column_as(ai_analysis::Column::Id.count(), "count")
+            .group_by(ai_analysis::Column::AnalysisType)
+            .into_model::<TypeCount>()
+            .all(&self.db)
+            .await?;
+        Ok(result)
+    }
+}
+
+#[derive(Debug, FromQueryResult)]
+pub struct UsageOverview {
+    pub total_count: i64,
+}
+
+#[derive(Debug, FromQueryResult)]
+pub struct TypeCount {
+    pub analysis_type: String,
+    pub count: i64,
 }