diff --git a/pkg/modules/generators/accessories/mysql/alicloud_rds.go b/pkg/modules/generators/accessories/mysql/alicloud_rds.go
index 97010a19..6ef17c5f 100644
--- a/pkg/modules/generators/accessories/mysql/alicloud_rds.go
+++ b/pkg/modules/generators/accessories/mysql/alicloud_rds.go
@@ -1,6 +1,8 @@
 package mysql
 
 import (
+	"fmt"
+	"os"
 	"strings"
 
 	v1 "k8s.io/api/core/v1"
@@ -14,6 +16,7 @@ import (
 
 const (
 	defaultAlicloudProviderURL = "registry.terraform.io/aliyun/alicloud/1.209.1"
+	alicloudRegionEnv          = "ALICLOUD_REGION"
 	alicloudDBInstance         = "alicloud_db_instance"
 	alicloudDBConnection       = "alicloud_db_connection"
 	alicloudRDSAccount         = "alicloud_rds_account"
@@ -58,9 +61,12 @@ func (g *mysqlGenerator) generateAlicloudResources(db *mysql.MySQL, spec *apiv1.
 	}
 
 	// Get the alicloud provider region, and the region of the alicloud provider must be set.
-	alicloudProviderRegion, err := inputs.GetProviderRegion(g.tfConfigs[inputs.AlicloudProvider])
-	if err != nil {
-		return nil, err
+	var alicloudProviderRegion string
+	if alicloudProviderRegion = inputs.GetProviderRegion(g.tfConfigs[inputs.AlicloudProvider]); alicloudProviderRegion == "" {
+		alicloudProviderRegion = os.Getenv(alicloudRegionEnv)
+	}
+	if alicloudProviderRegion == "" {
+		return nil, fmt.Errorf("alicloud provider region should not be empty")
 	}
 
 	// Build alicloud_db_instance.
diff --git a/pkg/modules/generators/accessories/mysql/aws_rds.go b/pkg/modules/generators/accessories/mysql/aws_rds.go
index 1ff2322d..e563fed9 100644
--- a/pkg/modules/generators/accessories/mysql/aws_rds.go
+++ b/pkg/modules/generators/accessories/mysql/aws_rds.go
@@ -2,6 +2,7 @@ package mysql
 
 import (
 	"fmt"
+	"os"
 
 	v1 "k8s.io/api/core/v1"
 
@@ -14,6 +15,7 @@ import (
 
 const (
 	defaultAWSProviderURL = "registry.terraform.io/hashicorp/aws/5.0.1"
+	awsRegionEnv          = "AWS_REGION"
 	awsSecurityGroup      = "aws_security_group"
 	awsDBInstance         = "aws_db_instance"
 )
@@ -62,9 +64,12 @@ func (g *mysqlGenerator) generateAWSResources(db *mysql.MySQL, spec *apiv1.Inten
 	}
 
 	// Get the aws provider region, and the region of the aws provider must be set.
-	awsProviderRegion, err := inputs.GetProviderRegion(g.tfConfigs[inputs.AWSProvider])
-	if err != nil {
-		return nil, err
+	var awsProviderRegion string
+	if awsProviderRegion = inputs.GetProviderRegion(g.tfConfigs[inputs.AWSProvider]); awsProviderRegion == "" {
+		awsProviderRegion = os.Getenv(awsRegionEnv)
+	}
+	if awsProviderRegion == "" {
+		return nil, fmt.Errorf("aws provider region should not be empty")
 	}
 
 	// Build random_password for aws_db_instance.
diff --git a/pkg/modules/generators/accessories/mysql/mysql_generator.go b/pkg/modules/generators/accessories/mysql/mysql_generator.go
index f3760e41..9300913c 100644
--- a/pkg/modules/generators/accessories/mysql/mysql_generator.go
+++ b/pkg/modules/generators/accessories/mysql/mysql_generator.go
@@ -119,7 +119,7 @@ func (g *mysqlGenerator) Generate(spec *apiv1.Intent) error {
 			return err
 		}
 
-		switch providerType {
+		switch strings.ToLower(providerType) {
 		case "aws":
 			secret, err = g.generateAWSResources(db, spec)
 		case "alicloud":
diff --git a/pkg/modules/generators/accessories/postgres/alicloud_rds.go b/pkg/modules/generators/accessories/postgres/alicloud_rds.go
index 7d0c09ec..07763aa7 100644
--- a/pkg/modules/generators/accessories/postgres/alicloud_rds.go
+++ b/pkg/modules/generators/accessories/postgres/alicloud_rds.go
@@ -1,6 +1,8 @@
 package postgres
 
 import (
+	"fmt"
+	"os"
 	"strings"
 
 	v1 "k8s.io/api/core/v1"
@@ -12,6 +14,7 @@ import (
 
 const (
 	defaultAlicloudProviderURL = "registry.terraform.io/aliyun/alicloud/1.209.1"
+	alicloudRegionEnv          = "ALICLOUD_REGION"
 	alicloudDBInstance         = "alicloud_db_instance"
 	alicloudDBConnection       = "alicloud_db_connection"
 	alicloudRDSAccount         = "alicloud_rds_account"
@@ -56,9 +59,12 @@ func (g *postgresGenerator) generateAlicloudResources(db *postgres.PostgreSQL, s
 	}
 
 	// Get the alicloud provider region, and the region of the alicloud provider must be set.
-	alicloudProviderRegion, err := inputs.GetProviderRegion(g.tfConfigs[inputs.AlicloudProvider])
-	if err != nil {
-		return nil, err
+	var alicloudProviderRegion string
+	if alicloudProviderRegion = inputs.GetProviderRegion(g.tfConfigs[inputs.AlicloudProvider]); alicloudProviderRegion == "" {
+		alicloudProviderRegion = os.Getenv(alicloudRegionEnv)
+	}
+	if alicloudProviderRegion == "" {
+		return nil, fmt.Errorf("alicloud provider region should not be empty")
 	}
 
 	// Build alicloud_db_instance.
diff --git a/pkg/modules/generators/accessories/postgres/aws_rds.go b/pkg/modules/generators/accessories/postgres/aws_rds.go
index b6d3398a..150c5a9e 100644
--- a/pkg/modules/generators/accessories/postgres/aws_rds.go
+++ b/pkg/modules/generators/accessories/postgres/aws_rds.go
@@ -2,6 +2,7 @@ package postgres
 
 import (
 	"fmt"
+	"os"
 
 	v1 "k8s.io/api/core/v1"
 	apiv1 "kusionstack.io/kusion/pkg/apis/core/v1"
@@ -12,6 +13,7 @@ import (
 
 const (
 	defaultAWSProviderURL = "registry.terraform.io/hashicorp/aws/5.0.1"
+	awsRegionEnv          = "AWS_REGION"
 	awsSecurityGroup      = "aws_security_group"
 	awsDBInstance         = "aws_db_instance"
 )
@@ -60,9 +62,12 @@ func (g *postgresGenerator) generateAWSResources(db *postgres.PostgreSQL, spec *
 	}
 
 	// Get the aws provider region, and the region of the aws provider must be set.
-	awsProviderRegion, err := inputs.GetProviderRegion(g.tfConfigs[inputs.AWSProvider])
-	if err != nil {
-		return nil, err
+	var awsProviderRegion string
+	if awsProviderRegion = inputs.GetProviderRegion(g.tfConfigs[inputs.AWSProvider]); awsProviderRegion == "" {
+		awsProviderRegion = os.Getenv(awsRegionEnv)
+	}
+	if awsProviderRegion == "" {
+		return nil, fmt.Errorf("aws provider region should not be empty")
 	}
 
 	// Build random_password for aws_db_instance.
diff --git a/pkg/modules/generators/accessories/postgres/postgres_generator.go b/pkg/modules/generators/accessories/postgres/postgres_generator.go
index 9f81d139..af387835 100644
--- a/pkg/modules/generators/accessories/postgres/postgres_generator.go
+++ b/pkg/modules/generators/accessories/postgres/postgres_generator.go
@@ -119,7 +119,7 @@ func (g *postgresGenerator) Generate(spec *apiv1.Intent) error {
 			return err
 		}
 
-		switch providerType {
+		switch strings.ToLower(providerType) {
 		case "aws":
 			secret, err = g.generateAWSResources(db, spec)
 		case "alicloud":
diff --git a/pkg/modules/inputs/provider.go b/pkg/modules/inputs/provider.go
index 884a061c..f57c7772 100644
--- a/pkg/modules/inputs/provider.go
+++ b/pkg/modules/inputs/provider.go
@@ -11,7 +11,6 @@ import (
 const (
 	errInvalidProviderSource = "invalid provider source: %s"
 	errEmptyProviderVersion  = "empty provider version"
-	errEmptyProviderRegion   = "empty provider region for source: %s"
 )
 
 const (
@@ -75,11 +74,11 @@ func GetProviderURL(providerConfig *apiv1.ProviderConfig) (string, error) {
 }
 
 // GetProviderRegion returns the region of the terraform provider.
-func GetProviderRegion(providerConfig *apiv1.ProviderConfig) (string, error) {
+func GetProviderRegion(providerConfig *apiv1.ProviderConfig) string {
 	region, ok := providerConfig.GenericConfig["region"]
 	if !ok {
-		return "", fmt.Errorf(errEmptyProviderRegion, providerConfig.Source)
+		return ""
 	}
 
-	return region.(string), nil
+	return region.(string)
 }
diff --git a/pkg/modules/inputs/provider_test.go b/pkg/modules/inputs/provider_test.go
index e1e67d7f..a7066bc7 100644
--- a/pkg/modules/inputs/provider_test.go
+++ b/pkg/modules/inputs/provider_test.go
@@ -109,10 +109,9 @@ func TestGetProviderURL(t *testing.T) {
 
 func TestGetProviderRegion(t *testing.T) {
 	tests := []struct {
-		name        string
-		data        *apiv1.ProviderConfig
-		expected    string
-		expectedErr error
+		name     string
+		data     *apiv1.ProviderConfig
+		expected string
 	}{
 		{
 			name: "Valid Provider Config",
@@ -123,8 +122,7 @@ func TestGetProviderRegion(t *testing.T) {
 					"region": "us-east-1",
 				},
 			},
-			expected:    "us-east-1",
-			expectedErr: nil,
+			expected: "us-east-1",
 		},
 		{
 			name: "Empty Provider Region",
@@ -132,18 +130,12 @@ func TestGetProviderRegion(t *testing.T) {
 				Source:  "hashicorp/aws",
 				Version: "5.0.1",
 			},
-			expected:    "",
-			expectedErr: fmt.Errorf(errEmptyProviderRegion, "hashicorp/aws"),
+			expected: "",
 		},
 	}
 
 	for _, test := range tests {
-		actual, actualErr := GetProviderRegion(test.data)
-		if test.expectedErr == nil {
-			assert.Equal(t, test.expected, actual)
-			assert.NoError(t, actualErr)
-		} else {
-			assert.ErrorContains(t, actualErr, test.expectedErr.Error())
-		}
+		actual := GetProviderRegion(test.data)
+		assert.Equal(t, test.expected, actual)
 	}
 }