diff --git a/main.go b/main.go
index 158cff5..7fbef9b 100644
--- a/main.go
+++ b/main.go
@@ -78,6 +78,19 @@ func run(command string, args []string, c chan string) {
 				log.Panic(err)
 			}
 			c <- lp.PrettyString()
+		} else if len(args) > 0 && args[0] == "m" {
+			t := Now
+			if len(args) > 1 {
+				t, err = time.Parse("2006/01", args[1])
+				if err != nil {
+					log.Panic("錯誤日期格式yyyy/mm")
+				}
+			}
+			lp, err := getMonthTotalLegalPerson(t)
+			if err != nil {
+				log.Panic(err)
+			}
+			c <- lp.PrettyString()
 		} else {
 			log.Panic("錯誤指令")
 		}
diff --git a/query.go b/query.go
index 8da3f57..fca170b 100644
--- a/query.go
+++ b/query.go
@@ -89,6 +89,19 @@ func getDayTotalLegalPerson(date time.Time) (*twse.LegalPersonTotal, error) {
 	return totalPerson, nil
 }
 
+func getMonthTotalLegalPerson(date time.Time) (*twse.LegalPersonTotal, error) {
+	cacheKey := "month_total_legal_persons_"
+	if x, found := Cache.Get(cacheKey + date.Format("200601") + "01"); found {
+		return x.(*twse.LegalPersonTotal), nil
+	}
+	totalPerson, err := twse.MonthLegalPersonTotal(date)
+	if err != nil {
+		return &twse.LegalPersonTotal{}, err
+	}
+	Cache.Set(cacheKey+totalPerson.Date, totalPerson, cache.NoExpiration)
+	return totalPerson, nil
+}
+
 func getMonthLegalPersons(date time.Time) (*twse.LegalPersonStocks, error) {
 	cacheKey := "month_legal_persons_"
 	if x, found := Cache.Get(cacheKey + date.Format("200601") + "01"); found {
diff --git a/twse/twse.go b/twse/twse.go
index aefab8a..5643009 100644
--- a/twse/twse.go
+++ b/twse/twse.go
@@ -75,6 +75,23 @@ func DayLegalPersonTotal(date time.Time) (*LegalPersonTotal, error) {
 	return legalPerson, nil
 }
 
+func MonthLegalPersonTotal(date time.Time) (*LegalPersonTotal, error) {
+	var url string
+	if date.Format("20060102") == time.Now().In(Loc).Format("20060102") {
+		url = "https://www.twse.com.tw/fund/BFI82U?response=json&weekDate=&monthDate=&type=month"
+	} else {
+		url = fmt.Sprintf("https://www.twse.com.tw/fund/BFI82U?response=json&weekDate=&monthDate=%s&type=month&dayDate=", date.Format("20060102"))
+	}
+	response := &LegalPersonResponse{}
+	legalPerson := &LegalPersonTotal{}
+	err := request(url, response)
+	if err != nil {
+		return legalPerson, err
+	}
+	legalPerson = NewLegalPersonTotal(response.Date, response.Title, response.Data)
+	return legalPerson, nil
+}
+
 func MonthLegalPersons(date time.Time) (*LegalPersonStocks, error) {
 	var url string
 	if date.Format("20060102") == time.Now().In(Loc).Format("20060102") {