diff --git a/data/fallrate_v1.csv b/data/error-rate_v1.csv
similarity index 100%
rename from data/fallrate_v1.csv
rename to data/error-rate_v1.csv
diff --git a/vna/define.go b/vna/define.go
index 25ace7f..1a25c1c 100644
--- a/vna/define.go
+++ b/vna/define.go
@@ -32,7 +32,7 @@ type DetectedResult struct {
 	ProvinceKey    string  // 所属省份查询Key
 	CityName       string  // 所属城市全称
 	CityKey        string  // 所属城市查询Key
-	FallRate       float32 // 车牌易错字符统计
+	ErrorRate      float32 // 车牌易错字符统计
 }
 
 func (dr DetectedResult) String() string {
@@ -41,6 +41,6 @@ func (dr DetectedResult) String() string {
 		dr.ProvinceKey, dr.ProvinceName, dr.CityKey, dr.CityName)
 }
 
-func (dr DetectedResult) FallRateEqualTo(fallRate float32) bool {
-	return math.Abs(float64(fallRate-dr.FallRate)) < 0.0000000001
+func (dr DetectedResult) ErrorRateEqualTo(fallRate float32) bool {
+	return math.Abs(float64(fallRate-dr.ErrorRate)) < 0.0000000001
 }
diff --git a/vna/detector.go b/vna/detector.go
index c274902..40b0095 100644
--- a/vna/detector.go
+++ b/vna/detector.go
@@ -22,9 +22,9 @@ func DetectNumber(number string) (DetectedResult, error) {
 	provinceShort, provinceName, cityShort, cityName := detectSpecChars(numType, numberRune)
 
 	// 统计易错字符
-	var fallRate float32
+	var errorRate float32
 	for _, c := range numberRune {
-		fallRate += gFallRateNames[string(c)]
+		errorRate += gErrorRateNames[string(c)]
 	}
 
 	return DetectedResult{
@@ -35,7 +35,7 @@ func DetectNumber(number string) (DetectedResult, error) {
 		ProvinceKey:    provinceShort,
 		CityName:       cityName,
 		CityKey:        cityShort,
-		FallRate:       fallRate,
+		ErrorRate:      errorRate,
 	}, nil
 }
 
diff --git a/vna/detector_test.go b/vna/detector_test.go
index d36b75c..f3fefc0 100644
--- a/vna/detector_test.go
+++ b/vna/detector_test.go
@@ -72,8 +72,8 @@ func TestDetectNumberEmbassy(t *testing.T) {
 func TestDetectNumberFallRate(t *testing.T) {
 	InitDetectorEnv("../" + DataDirName)
 	dr, _ := DetectNumber("粤BF49883")
-	if dr.FallRateEqualTo(0.9) {
-		t.Error("fall rate not match, was:", dr.FallRate)
+	if dr.ErrorRateEqualTo(0.9) {
+		t.Error("fall rate not match, was:", dr.ErrorRate)
 	}
 }
 
diff --git a/vna/env.go b/vna/env.go
index f21dead..a7fcefc 100644
--- a/vna/env.go
+++ b/vna/env.go
@@ -18,9 +18,9 @@ import (
 const DataDirName = "data"
 
 var (
-	gProvinceNames = make(map[string]string)
-	gCitiesNames   = make(map[string]string)
-	gFallRateNames = make(map[string]float32)
+	gProvinceNames  = make(map[string]string)
+	gCitiesNames    = make(map[string]string)
+	gErrorRateNames = make(map[string]float32)
 )
 
 var (
@@ -50,7 +50,7 @@ func InitDetectorEnv(base string) {
 		"city-wj_v1.csv")
 
 	// 加载易错统计数据
-	initFallRate(base, "fallrate_v1.csv")
+	initFallRate(base, "error-rate_v1.csv")
 }
 
 func initProvinces(base string, names ...string) {
@@ -87,7 +87,7 @@ func initFallRate(base string, name string) {
 		if nil != err {
 			panic(err)
 		}
-		gFallRateNames[kv.Key] = float32(val)
+		gErrorRateNames[kv.Key] = float32(val)
 	}
 }