diff --git a/src/dconfigfile.cpp b/src/dconfigfile.cpp
index 896248a8..6a7da03d 100644
--- a/src/dconfigfile.cpp
+++ b/src/dconfigfile.cpp
@@ -1288,12 +1288,22 @@ class Q_DECL_HIDDEN DConfigFilePrivate : public DObjectPrivate {
                     return cache->setValue(key, value, configMeta->serial(key), cache->uid(), appid);
 
                 // convert copy to meta's type, it promises `setValue` don't change meta's type.
+                // canConvert isn't explicit, e.g: QString is also can convert to double.
                 auto copy = value;
                 if (!copy.convert(metaValue.metaType())) {
                     qCWarning(cfLog) << "check type error, meta type is " << metaValue.metaType().name()
                                      << ", and now type is " << value.metaType().name();
                     return false;
                 }
+
+                 // TODO it's a bug of qt, MetaType of 1.0 is qlonglong instead of double in json file.
+                static const QVector<QMetaType> filterConvertType {
+                    QMetaType{QMetaType::Double}
+                };
+                // reset to origin value.
+                if (filterConvertType.contains(value.metaType())) {
+                    copy = value;
+                }
 #else
                 if (metaValue.type() == value.type())
                     return cache->setValue(key, value, configMeta->serial(key), cache->uid(), appid);
@@ -1304,6 +1314,13 @@ class Q_DECL_HIDDEN DConfigFilePrivate : public DObjectPrivate {
                                      << ", and now type is " << value.type();
                     return false;
                 }
+
+                static const QVector<QVariant::Type> filterConvertType {
+                    QVariant::Double
+                };
+                if (filterConvertType.contains(value.type())) {
+                    copy = value;
+                }
 #endif
 
                 return cache->setValue(key, copy, configMeta->serial(key), cache->uid(), appid);
diff --git a/tests/data/dconf-example.meta.json b/tests/data/dconf-example.meta.json
index abe786f0..4063fab8 100755
--- a/tests/data/dconf-example.meta.json
+++ b/tests/data/dconf-example.meta.json
@@ -40,6 +40,14 @@
       "permissions": "readwrite",
       "visibility": "public"
     },
+    "numberDouble": {
+      "value": 1.0,
+      "serial": 0,
+      "flags": ["global"],
+      "name": "double value type",
+      "permissions": "readwrite",
+      "visibility": "public"
+    },
     "array": {
       "value": ["value1", "value2"],
       "serial": 0,
diff --git a/tests/ut_dconfigfile.cpp b/tests/ut_dconfigfile.cpp
index 8b301ce3..9efb5d24 100644
--- a/tests/ut_dconfigfile.cpp
+++ b/tests/ut_dconfigfile.cpp
@@ -124,6 +124,11 @@ TEST_F(ut_DConfigFile, setValueTypeCheck) {
         ASSERT_FALSE(config.setValue("number", "1ab", "test", userCache.get()));
         ASSERT_EQ(config.value("number", userCache.get()).type(), type);
     }
+    {
+        const auto type = config.value("numberDouble", userCache.get()).type();
+        ASSERT_TRUE(config.setValue("numberDouble", 1.2, "test", userCache.get()));
+        ASSERT_EQ(config.value("numberDouble", userCache.get()), 1.2);
+    }
     {
         const auto type = config.value("array", userCache.get()).type();
         const QStringList array{"value1", "value2"};