diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13f968c73..e32348690 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,3 +2,4 @@
 ---
 
 - [feature: support reactive discovery client health indicator.](https://github.com/Tencent/spring-cloud-tencent/pull/983)
+- [feat: Enhance default configuration to support `application*.yaml` and `bootstrap*.yaml`.](https://github.com/Tencent/spring-cloud-tencent/pull/985)
diff --git a/spring-cloud-starter-tencent-polaris-config/src/main/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePuller.java b/spring-cloud-starter-tencent-polaris-config/src/main/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePuller.java
index fc203029b..f9df0c063 100644
--- a/spring-cloud-starter-tencent-polaris-config/src/main/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePuller.java
+++ b/spring-cloud-starter-tencent-polaris-config/src/main/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePuller.java
@@ -43,7 +43,7 @@ import org.springframework.util.StringUtils;
 /**
  * PolarisConfigFilePuller pull configFile from Polaris.
  *
- * @author wlx
+ * @author wlx, youta
  */
 public final class PolarisConfigFilePuller {
 
@@ -197,10 +197,12 @@ public final class PolarisConfigFilePuller {
 			}
 			internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "application-" + profile + ".properties"));
 			internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "application-" + profile + ".yml"));
+			internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "application-" + profile + ".yaml"));
 		}
 		// build default config properties files.
 		internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "application.properties"));
 		internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "application.yml"));
+		internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "application.yaml"));
 	}
 
 	private void buildInternalBootstrapConfigFiles(
@@ -211,9 +213,11 @@ public final class PolarisConfigFilePuller {
 			}
 			internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "bootstrap-" + profile + ".properties"));
 			internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "bootstrap-" + profile + ".yml"));
+			internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "bootstrap-" + profile + ".yaml"));
 		}
 		// build default config properties files.
 		internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "bootstrap.properties"));
 		internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "bootstrap.yml"));
+		internalConfigFiles.add(new DefaultConfigFileMetadata(namespace, serviceName, "bootstrap.yaml"));
 	}
 }
diff --git a/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFileLocatorTest.java b/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFileLocatorTest.java
index 6869b59e6..e7bbc6f86 100644
--- a/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFileLocatorTest.java
+++ b/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFileLocatorTest.java
@@ -80,8 +80,10 @@ public class PolarisConfigFileLocatorTest {
 		Map<String, Object> emptyMap = new HashMap<>();
 		ConfigKVFile emptyConfigFile = new MockedConfigKVFile(emptyMap);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 
 		when(polarisConfigProperties.getGroups()).thenReturn(null);
 		when(environment.getActiveProfiles()).thenReturn(new String[] {});
@@ -120,11 +122,15 @@ public class PolarisConfigFileLocatorTest {
 		Map<String, Object> emptyMap = new HashMap<>();
 		ConfigKVFile emptyConfigFile = new MockedConfigKVFile(emptyMap);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application-dev.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application-dev.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap-dev.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap-dev.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap-dev.yaml")).thenReturn(emptyConfigFile);
 
 		when(polarisConfigProperties.getGroups()).thenReturn(null);
 		when(environment.getActiveProfiles()).thenReturn(new String[] {"dev"});
@@ -149,8 +155,10 @@ public class PolarisConfigFileLocatorTest {
 
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "application.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 
 		List<ConfigFileGroup> customFiles = new LinkedList<>();
 		ConfigFileGroup configFileGroup = new ConfigFileGroup();
diff --git a/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePullerTest.java b/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePullerTest.java
index 0cf5e639a..6d316f33f 100644
--- a/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePullerTest.java
+++ b/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/adapter/PolarisConfigFilePullerTest.java
@@ -40,7 +40,7 @@ import static org.mockito.Mockito.when;
 /**
  * Test for {@link PolarisConfigFilePuller}.
  *
- * @author wlx
+ * @author wlx, youta
  */
 @ExtendWith(MockitoExtension.class)
 public class PolarisConfigFilePullerTest {
@@ -75,8 +75,10 @@ public class PolarisConfigFilePullerTest {
 		Map<String, Object> emptyMap = new HashMap<>();
 		ConfigKVFile emptyConfigFile = new MockedConfigKVFile(emptyMap);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 		CompositePropertySource compositePropertySource = new CompositePropertySource(polarisConfigPropertySourceName);
 
 		puller.initInternalConfigFiles(compositePropertySource, new String[] {}, new String[] {}, testServiceName);
@@ -113,11 +115,15 @@ public class PolarisConfigFilePullerTest {
 		Map<String, Object> emptyMap = new HashMap<>();
 		ConfigKVFile emptyConfigFile = new MockedConfigKVFile(emptyMap);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application-dev.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application-dev.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap-dev.properties")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap-dev.yml")).thenReturn(emptyConfigFile);
+		when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap-dev.yaml")).thenReturn(emptyConfigFile);
 		List<String> active = new ArrayList<>();
 		active.add("dev");
 		String[] activeProfiles = active.toArray(new String[] {});
diff --git a/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/configdata/PolarisConfigDataLoaderTest.java b/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/configdata/PolarisConfigDataLoaderTest.java
index 0fa441342..51b7744fc 100644
--- a/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/configdata/PolarisConfigDataLoaderTest.java
+++ b/spring-cloud-starter-tencent-polaris-config/src/test/java/com/tencent/cloud/polaris/config/configdata/PolarisConfigDataLoaderTest.java
@@ -88,8 +88,10 @@ public class PolarisConfigDataLoaderTest {
 			Map<String, Object> emptyMap = new HashMap<>();
 			ConfigKVFile emptyConfigFile = new MockedConfigKVFile(emptyMap);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 			Map<String, Object> applicationProperties = new HashMap<>();
 			applicationProperties.put("k1", "v1");
 			applicationProperties.put("k2", "v2");
@@ -162,11 +164,15 @@ public class PolarisConfigDataLoaderTest {
 			Map<String, Object> emptyMap = new HashMap<>();
 			ConfigKVFile emptyConfigFile = new MockedConfigKVFile(emptyMap);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application-dev.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application-dev.yaml")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap-dev.properties")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap-dev.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap-dev.yaml")).thenReturn(emptyConfigFile);
 
 			when(polarisConfigProperties.getGroups()).thenReturn(null);
 			when(polarisConfigProperties.getGroups()).thenReturn(null);
@@ -226,8 +232,10 @@ public class PolarisConfigDataLoaderTest {
 
 			when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "application.properties")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "application.yaml")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigPropertiesFile(testNamespace, testServiceName, "bootstrap.properties")).thenReturn(emptyConfigFile);
 			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yml")).thenReturn(emptyConfigFile);
+			when(configFileService.getConfigYamlFile(testNamespace, testServiceName, "bootstrap.yaml")).thenReturn(emptyConfigFile);
 
 			String customGroup = "group1";
 			String customFile1 = "file1.properties";