diff --git a/.github/workflows/pr-test.yml b/.github/workflows/pr-test.yml
index 8b3dc137..19d81608 100644
--- a/.github/workflows/pr-test.yml
+++ b/.github/workflows/pr-test.yml
@@ -38,6 +38,10 @@ env:
   MONGO_TEST_USER: "root"
   MONGO_TEST_PASS: "123456"
 
+  TAB_NAME: "::PET ADMIN"
+  PAGE_SIZE: "20"
+  PAGE_LINK: "https://yaoapps.com"
+
   DEMO_APP: ${{ github.WORKSPACE }}/../app
 
 jobs:
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 8b8567cc..71d49c39 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -42,6 +42,10 @@ env:
   MONGO_TEST_USER: "root"
   MONGO_TEST_PASS: "123456"
 
+  TAB_NAME: "::PET ADMIN"
+  PAGE_SIZE: "20"
+  PAGE_LINK: "https://yaoapps.com"
+
   DEMO_APP: ${{ github.WORKSPACE }}/../app
 
 jobs:
diff --git a/widgets/environment/environment.go b/widgets/environment/environment.go
new file mode 100644
index 00000000..a2a0a0a0
--- /dev/null
+++ b/widgets/environment/environment.go
@@ -0,0 +1,84 @@
+package environment
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	jsoniter "github.com/json-iterator/go"
+)
+
+// ReadFile open file and replace the content $ENV.XXX
+func ReadFile(file string, defaults ...map[string]interface{}) ([]byte, error) {
+	content := map[string]interface{}{}
+	bytes, err := ioutil.ReadFile(file)
+	if err != nil {
+		return nil, err
+	}
+
+	err = jsoniter.Unmarshal(bytes, &content)
+	if err != nil {
+		return nil, err
+	}
+
+	defaultValues := map[string]interface{}{}
+	if len(defaults) > 0 {
+		defaultValues = defaults[0]
+	}
+
+	Replace(content, defaultValues)
+	return jsoniter.Marshal(content)
+}
+
+// Replace replace content
+func Replace(content map[string]interface{}, defaults map[string]interface{}) {
+	replaceMap(content, defaults)
+}
+
+func replaceAny(value interface{}, defaults map[string]interface{}) interface{} {
+	switch value.(type) {
+	case string:
+		return replaceStr(value.(string), defaults)
+
+	case map[string]interface{}:
+		return replaceMap(value.(map[string]interface{}), defaults)
+
+	case []interface{}:
+		return replaceArr(value.([]interface{}), defaults)
+	}
+	return value
+}
+
+func replaceStr(value string, defaults map[string]interface{}) interface{} {
+
+	if strings.HasPrefix(value, "\\$$ENV.") {
+		return fmt.Sprintf("$ENV.%s", strings.TrimLeft(value, "\\$$ENV."))
+	}
+
+	if !strings.HasPrefix(value, "$ENV.") {
+		return value
+	}
+
+	name := strings.TrimLeft(value, "$ENV.")
+	v := os.Getenv(name)
+	if v != "" {
+		return v
+	}
+
+	return defaults[name]
+}
+
+func replaceMap(values map[string]interface{}, defaults map[string]interface{}) map[string]interface{} {
+	for key, value := range values {
+		values[key] = replaceAny(value, defaults)
+	}
+	return values
+}
+
+func replaceArr(values []interface{}, defaults map[string]interface{}) []interface{} {
+	for key, value := range values {
+		values[key] = replaceAny(value, defaults)
+	}
+	return values
+}
diff --git a/widgets/environment/environment_test.go b/widgets/environment/environment_test.go
new file mode 100644
index 00000000..8e0fb365
--- /dev/null
+++ b/widgets/environment/environment_test.go
@@ -0,0 +1,35 @@
+package environment
+
+import (
+	"path/filepath"
+	"testing"
+
+	jsoniter "github.com/json-iterator/go"
+	"github.com/stretchr/testify/assert"
+	"github.com/yaoapp/kun/maps"
+	"github.com/yaoapp/yao/config"
+)
+
+func TestReadFile(t *testing.T) {
+	file := filepath.Join(config.Conf.Root, "tables", "env.tab.json")
+	defaults := map[string]interface{}{"PAGE_STATUS": "cured"}
+	content, err := ReadFile(file, defaults)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	res := maps.MapStr{}
+	err = jsoniter.Unmarshal(content, &res)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	res = res.Dot()
+	// utils.Dump(res)
+
+	assert.Equal(t, "::PET ADMIN", res.Get("name"))
+	assert.Equal(t, "20", res.Get("action.search.default.2"))
+	assert.Equal(t, "https://yaoapps.com", res.Get("layout.header.preset.import.operation.0.link"))
+	assert.Equal(t, "cured", res.Get("layout.table.operation.actions.2.action.Table.save.status"))
+
+}
diff --git a/widgets/table/table.go b/widgets/table/table.go
index bf9370e4..6513bca2 100644
--- a/widgets/table/table.go
+++ b/widgets/table/table.go
@@ -12,6 +12,7 @@ import (
 	"github.com/yaoapp/yao/config"
 	"github.com/yaoapp/yao/share"
 	"github.com/yaoapp/yao/widgets/component"
+	"github.com/yaoapp/yao/widgets/environment"
 	"github.com/yaoapp/yao/widgets/field"
 )
 
@@ -113,9 +114,9 @@ func LoadFrom(dir string, prefix string) error {
 	messages := []string{}
 	err := share.Walk(dir, ".json", func(root, filename string) {
 		id := prefix + share.ID(root, filename)
-		data := share.ReadFile(filename)
+		data, err := environment.ReadFile(filename)
 		dsl := New(id)
-		err := jsoniter.Unmarshal(data, dsl)
+		err = jsoniter.Unmarshal(data, dsl)
 		if err != nil {
 			messages = append(messages, fmt.Sprintf("[%s] %s", id, err.Error()))
 			return
diff --git a/widgets/table/table_test.go b/widgets/table/table_test.go
index 76461d58..dbb343aa 100644
--- a/widgets/table/table_test.go
+++ b/widgets/table/table_test.go
@@ -19,7 +19,7 @@ func TestLoad(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	assert.Equal(t, 2, len(Tables))
+	assert.Equal(t, 3, len(Tables))
 }
 
 func prepare(t *testing.T, language ...string) {