diff --git a/CHANGELOG.md b/CHANGELOG.md
index 94c9e671bdd..e7db9b7c5e1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@ Docs: https://docs.openclaw.ai
 ### Fixes
 
 - Agents/edit tool: honor `file_path` and related path aliases when resolving edit-recovery targets, so post-write errors no longer surface false edit failures after the file actually changed. Fixes #81909. Thanks @giodl73-repo.
+- QQBot: treat only explicit truthy `QQBOT_DEBUG` values as enabling debug logs, so false-like values such as `0` no longer expose debug output. Fixes #82644. (#82697) Thanks @leno23.
 - Gateway/diagnostics: add opt-in critical memory pressure stability snapshots with gateway logs, V8 heap, cgroup, active-resource, and redacted large session-file evidence. Fixes #82518.
 - Doctor/Gateway: avoid treating unrelated macOS LaunchAgents as legacy gateways just because their environment values mention old checkout paths.
 - CLI/setup: collapse raw gateway config keys in existing-config summaries into friendly `Model` and `Gateway` rows.
diff --git a/extensions/qqbot/src/engine/utils/log.test.ts b/extensions/qqbot/src/engine/utils/log.test.ts
index b12f076eea5..09444fb8cc1 100644
--- a/extensions/qqbot/src/engine/utils/log.test.ts
+++ b/extensions/qqbot/src/engine/utils/log.test.ts
@@ -25,4 +25,16 @@ describe("QQBot debug logging", () => {
 
     expect(logSpy).toHaveBeenCalledWith("prefix line one line two");
   });
+
+  it.each(["0", "false", "off", "no"])(
+    "does not enable debug logging for QQBOT_DEBUG=%s",
+    (value) => {
+      process.env.QQBOT_DEBUG = value;
+      const logSpy = vi.spyOn(console, "log").mockImplementation(() => {});
+
+      debugLog("private message text");
+
+      expect(logSpy).not.toHaveBeenCalled();
+    },
+  );
 });
diff --git a/extensions/qqbot/src/engine/utils/log.ts b/extensions/qqbot/src/engine/utils/log.ts
index 7bb284df88a..711b2d7ea8b 100644
--- a/extensions/qqbot/src/engine/utils/log.ts
+++ b/extensions/qqbot/src/engine/utils/log.ts
@@ -8,7 +8,23 @@
  * Self-contained within engine/ — no framework SDK dependency.
  */
 
-const isDebug = () => !!process.env.QQBOT_DEBUG;
+function isQqbotDebugEnabled(): boolean {
+  const value = process.env.QQBOT_DEBUG;
+  if (typeof value !== "string") {
+    return false;
+  }
+  switch (value.trim().toLowerCase()) {
+    case "1":
+    case "on":
+    case "true":
+    case "yes":
+      return true;
+    default:
+      return false;
+  }
+}
+
+const isDebug = () => isQqbotDebugEnabled();
 const MAX_LOG_VALUE_CHARS = 4096;
 
 export function sanitizeDebugLogValue(value: unknown): string {