diff --git a/server-rs/crates/api-server/src/tripo3d/result.rs b/server-rs/crates/api-server/src/tripo3d/result.rs
index c93f1b754..63a38fbbc 100644
--- a/server-rs/crates/api-server/src/tripo3d/result.rs
+++ b/server-rs/crates/api-server/src/tripo3d/result.rs
@@ -3,13 +3,16 @@
 //! 结果按端点使用严格 tagged enum，只带正式资源引用与已落地对象元数据；
 //! provider task ID、带签名的临时地址与 SDK 类型都不进入结果。
 
+use axum::http::StatusCode;
 use serde_json::{Value, json};
 use shared_contracts::model3d::Model3dGenerationResult;
 use shared_contracts::model3d::common::{Model3dGeneratedArtifact, Model3dGenerationTargetRef};
 use shared_contracts::model3d::image_to_model::Model3dImageToModelResult;
 use shared_contracts::model3d::text_to_model::Model3dTextToModelResult;
 
-use super::{job::Model3dJobKind, storage::StoredModel3dArtifact};
+use crate::http_error::AppError;
+
+use super::{job::Model3dJobKind, provider::TRIPO_PROVIDER, storage::StoredModel3dArtifact};
 
 pub(crate) fn artifact_metadata(stored: &StoredModel3dArtifact) -> Model3dGeneratedArtifact {
     Model3dGeneratedArtifact {
@@ -47,13 +50,15 @@ pub(crate) fn build_result(
 }
 
 /// 队列终态结果载荷：外层固定 `result` 字段，值就是严格类型化的完成结果。
-pub(crate) fn job_result_payload(result: Model3dGenerationResult) -> Value {
-    match serde_json::to_value(result) {
-        Ok(value) => json!({ "result": value }),
-        // 结果由字符串与数字组成，序列化失败属于实现错误；仍返回可对账的稳定形状。
-        Err(error) => json!({
-            "result": null,
-            "resultSerializeError": error.to_string(),
-        }),
-    }
+///
+/// 序列化失败按服务端问题上报，由 worker 把任务标记为失败 —— 不能落一条
+/// 「完成但 `result: null`」的终态，消费方会当成成功却反序列化不出结果。
+pub(crate) fn job_result_payload(result: Model3dGenerationResult) -> Result<Value, AppError> {
+    let value = serde_json::to_value(result).map_err(|error| {
+        AppError::from_status(StatusCode::INTERNAL_SERVER_ERROR).with_details(json!({
+            "provider": TRIPO_PROVIDER,
+            "message": format!("序列化 3D 生成结果失败：{error}"),
+        }))
+    })?;
+    Ok(json!({ "result": value }))
 }
diff --git a/server-rs/crates/api-server/src/tripo3d/worker.rs b/server-rs/crates/api-server/src/tripo3d/worker.rs
index 662822a0e..d73b479de 100644
--- a/server-rs/crates/api-server/src/tripo3d/worker.rs
+++ b/server-rs/crates/api-server/src/tripo3d/worker.rs
@@ -365,7 +365,7 @@ async fn persist_result(
         _ => EditorCanvasLayoutPlan::None,
     };
     let job_result_payload_json =
-        editor_generation_job_result_payload_json(caller, job_result_payload(result));
+        editor_generation_job_result_payload_json(caller, job_result_payload(result)?);
     persist_editor_generation_result_atomically(
         state,
         caller,
@@ -499,7 +499,7 @@ mod tests {
                 &model,
                 &preview,
             );
-            let payload = job_result_payload(result);
+            let payload = job_result_payload(result).expect("完成结果应可序列化");
             let result = &payload["result"];
 
             assert_eq!(result["kind"], json!(expected_kind));