diff --git a/cli/color.go b/cli/color.go
index 334868c4f..0bef4e326 100644
--- a/cli/color.go
+++ b/cli/color.go
@@ -121,7 +121,7 @@ func APIListColor() string {
 	return apiListColor
 }
 
-func colorized(color string, a ...interface{}) string {
+func Colorized(color string, a ...interface{}) string {
 	if withColor && color != "" {
 		return color + fmt.Sprint(a...) + ColorOff
 	}
@@ -129,15 +129,15 @@ func colorized(color string, a ...interface{}) string {
 }
 
 func PrintWithColor(w io.Writer, color string, a ...interface{}) (n int, err error) {
-	return Print(w, colorized(color, a...))
+	return Print(w, Colorized(color, a...))
 }
 
 func Notice(w io.Writer, a ...interface{}) (n int, err error) {
-	return Print(w, colorized(NoticeColor, a...))
+	return Print(w, Colorized(NoticeColor, a...))
 }
 
 func Error(w io.Writer, a ...interface{}) (n int, err error) {
-	return Print(w, colorized(ErrorColor, a...))
+	return Print(w, Colorized(ErrorColor, a...))
 }
 
 func Noticef(w io.Writer, format string, args ...interface{}) (n int, err error) {
diff --git a/cli/color_test.go b/cli/color_test.go
index a19feb43a..4728b8920 100644
--- a/cli/color_test.go
+++ b/cli/color_test.go
@@ -30,9 +30,9 @@ func TestColor(t *testing.T) {
 	assert.Empty(t, ProductListColor())
 	assert.Empty(t, APIListColor())
 
-	assert.Equal(t, "a", colorized("", "a"))
+	assert.Equal(t, "a", Colorized("", "a"))
 	EnableColor()
-	assert.Equal(t, "reda\033[0m", colorized("red", "a"))
+	assert.Equal(t, "reda\033[0m", Colorized("red", "a"))
 }
 
 func TestCotainWriter(t *testing.T) {
diff --git a/newmeta/meta.go b/newmeta/meta.go
index 251fb1cbe..0fe28b4bd 100644
--- a/newmeta/meta.go
+++ b/newmeta/meta.go
@@ -73,6 +73,40 @@ type API struct {
 	Deprecated bool   `json:"deprecated"`
 }
 
+// {
+// 	"name": "AddEntriesToAcl",
+// 	"deprecated": false,
+// 	"protocol": "HTTP|HTTPS",
+// 	"method": "GET|POST",
+// 	"pathPattern": "",
+// 	"parameters": [
+// 	  {
+// 		"name": "AclEntries",
+// 		"description": "The IP entries that you want to add. You can add up to 20 IP entries in each call.",
+// 		"position": "Query",
+// 		"type": "Array",
+// 		"required": true
+// 	  }
+// 	]
+//  }
+
+type APIDetail struct {
+	Name        string             `json:"name"`
+	Deprecated  bool               `json:"deprecated"`
+	Protocol    string             `json:"protocol"`
+	Method      string             `json:"method"`
+	PathPattern string             `json:"pathPattern"`
+	Parameters  []RequestParameter `json:"parameters"`
+}
+
+type RequestParameter struct {
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	Position    string `json:"position"`
+	Type        string `json:"type"`
+	Required    bool   `json:"required"`
+}
+
 func GetProductName(language, code string) (name string, err error) {
 	content, err := GetMetadata(language, "/products.json")
 	if err != nil {
@@ -81,6 +115,9 @@ func GetProductName(language, code string) (name string, err error) {
 
 	products := new(ProductSet)
 	err = json.Unmarshal(content, &products)
+	if err != nil {
+		return
+	}
 
 	for _, p := range products.Products {
 		if strings.EqualFold(p.Code, code) {
@@ -100,6 +137,9 @@ func GetAPI(language, code, name string) (api *API, err error) {
 
 	version := new(Version)
 	err = json.Unmarshal(content, &version)
+	if err != nil {
+		return
+	}
 
 	if found, ok := version.APIs[name]; ok {
 		api = &found
@@ -108,6 +148,22 @@ func GetAPI(language, code, name string) (api *API, err error) {
 	return
 }
 
+func GetAPIDetail(language, code, name string) (api *APIDetail, err error) {
+	content, err := GetMetadata(language, "/"+strings.ToLower(code)+"/"+name+".json")
+	if err != nil {
+		return
+	}
+
+	detail := new(APIDetail)
+	err = json.Unmarshal(content, &detail)
+	if err != nil {
+		return
+	}
+
+	api = detail
+	return
+}
+
 func GetMetadataPrefix(language string) string {
 	if language == "en" {
 		return "en-US"
diff --git a/newmeta/meta_test.go b/newmeta/meta_test.go
index 13f134335..ae8737e5e 100644
--- a/newmeta/meta_test.go
+++ b/newmeta/meta_test.go
@@ -29,3 +29,11 @@ func TestGetAPI(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Nil(t, api2)
 }
+
+func TestGetAPIDetail(t *testing.T) {
+	api, err := GetAPIDetail("en", "ecs", "DescribeRegions")
+	assert.Nil(t, err)
+	assert.Equal(t, "DescribeRegions", api.Name)
+	assert.Equal(t, "GET|POST", api.Method)
+	assert.Equal(t, false, api.Deprecated)
+}
diff --git a/openapi/library.go b/openapi/library.go
index 4624323e9..b33ce6860 100644
--- a/openapi/library.go
+++ b/openapi/library.go
@@ -135,24 +135,27 @@ func (a *Library) PrintApiUsage(productCode string, apiName string) error {
 		return &InvalidApiError{Name: apiName, product: &product}
 	}
 
+	productName, _ := newmeta.GetProductName(i18n.GetLanguage(), productCode)
+
 	if product.ApiStyle == "restful" {
-		cli.Printf(a.writer, "\nProduct:     %s (%s)\n", product.Code, product.Name[i18n.GetLanguage()])
+		cli.Printf(a.writer, "\nProduct:     %s (%s)\n", product.Code, productName)
 		cli.Printf(a.writer, "Method:      %s\n", api.Method)
 		cli.Printf(a.writer, "PathPattern: %s\n", api.PathPattern)
 	} else {
-		cli.Printf(a.writer, "\nProduct: %s (%s)\n", product.Code, product.Name[i18n.GetLanguage()])
+		cli.Printf(a.writer, "\nProduct: %s (%s)\n", product.Code, productName)
 	}
 
 	cli.Printf(a.writer, "\nParameters:\n")
 
 	w := tabwriter.NewWriter(a.writer, 8, 0, 1, ' ', 0)
-	printParameters(w, api.Parameters, "")
+	detail, _ := newmeta.GetAPIDetail(i18n.GetLanguage(), productCode, apiName)
+	printParameters(w, api.Parameters, "", detail)
 	w.Flush()
 
 	return nil
 }
 
-func printParameters(w io.Writer, params []meta.Parameter, prefix string) {
+func printParameters(w io.Writer, params []meta.Parameter, prefix string, detail *newmeta.APIDetail) {
 
 	sort.Sort(meta.ParameterSlice(params))
 
@@ -171,16 +174,26 @@ func printParameters(w io.Writer, params []meta.Parameter, prefix string) {
 
 		if param.Type == "RepeatList" {
 			if len(param.SubParameters) > 0 {
-				printParameters(w, param.SubParameters, prefix+param.Name+".n.")
+				printParameters(w, param.SubParameters, prefix+param.Name+".n.", detail)
 			} else {
-				fmt.Fprintf(w, "  --%s%s.n\t%s\t%s\t%s\n", prefix, param.Name, param.Type, required(param.Required), getDescription(param.Description))
+				fmt.Fprintf(w, "  --%s%s.n\t%s\t%s\n\n", cli.Colorized(cli.BBlack, prefix), cli.Colorized(cli.BBlack, param.Name), param.Type, required(param.Required))
+				displayDescription(w, getDescription(detail, param.Name))
 			}
 		} else {
-			fmt.Fprintf(w, "  --%s%s\t%s\t%s\t%s\n", prefix, param.Name, param.Type, required(param.Required), getDescription(param.Description))
+			fmt.Fprintf(w, "  --%s%s\t%s\t%s\n\n", cli.Colorized(cli.BBlack, prefix), cli.Colorized(cli.BBlack, param.Name), param.Type, required(param.Required))
+			displayDescription(w, getDescription(detail, param.Name))
 		}
 	}
 }
 
+func displayDescription(w io.Writer, desc string) {
+	lines := strings.Split(desc, "\n")
+	for _, v := range lines {
+		fmt.Fprintf(w, "  %s\n", v)
+	}
+	fmt.Fprintf(w, "\n")
+}
+
 func required(r bool) string {
 	if r {
 		return "Required"
@@ -189,15 +202,15 @@ func required(r bool) string {
 	}
 }
 
-func getDescription(d map[string]string) string {
+func getDescription(detail *newmeta.APIDetail, name string) string {
+	if detail == nil {
+		return ""
+	}
+	for _, p := range detail.Parameters {
+		if name == p.Name {
+			return strings.TrimSpace(p.Description)
+		}
+	}
+
 	return ""
-	// TODO: description too long, need optimize for display
-	//if d == nil {
-	//	return ""
-	//}
-	//if v, ok := d[i18n.GetLanguage()]; ok {
-	//	return v
-	//} else {
-	//	return ""
-	//}
 }
diff --git a/openapi/library_test.go b/openapi/library_test.go
index af6a25190..e51ce2680 100644
--- a/openapi/library_test.go
+++ b/openapi/library_test.go
@@ -15,6 +15,7 @@ package openapi
 
 import (
 	"github.com/aliyun/aliyun-cli/meta"
+	"github.com/aliyun/aliyun-cli/newmeta"
 	"github.com/stretchr/testify/assert"
 
 	"bytes"
@@ -97,7 +98,7 @@ func Test_printParameters(t *testing.T) {
 			},
 		},
 	}
-	printParameters(w, params, "")
+	printParameters(w, params, "", &newmeta.APIDetail{})
 }
 
 func getRepository(content string) *meta.Repository {