diff --git a/README.md b/README.md
index b7235b9..7131a40 100644
--- a/README.md
+++ b/README.md
@@ -69,10 +69,9 @@ docker pull timothyye/godns:1.0
 docker run -d --name godns --restart=always \
 -e EMAIL=your_dnspod_account \
 -e PASSWORD=your_dnspod_password \
--e DOMAIN=your_domain \
--e SUB_DOMAIN=your_sub_domain DOCKER_IMAGE_ID                                                                                              
+-e DOMAINS="your_domain1,your_domain2" DOCKER_IMAGE_ID                                                                                              
 ```
 
 
 
-## Enjoy it!
\ No newline at end of file
+## Enjoy it!
diff --git a/config_sample.json b/config_sample.json
index 9a424ce..3e1f521 100644
--- a/config_sample.json
+++ b/config_sample.json
@@ -1,11 +1,17 @@
 {
-	"email": "",
-	"password": "",
-	"login_token": "",
-	"domain": "",
-	"sub_domain": "",
-	"ip_url": "http://members.3322.org/dyndns/getip",
-	"log_path":"./godns.log",
-	"log_size":16,
-	"log_num":3
+  "email": "example@gmail.com",
+  "password": "",
+  "login_token": "",
+  "domains": [{
+      "domain_name":"example.com",
+      "sub_domains":["www","test"]
+    },{
+      "domain_name":"example2.com",
+      "sub_domains":["www","test"]
+    }
+  ],
+  "ip_url": "http://members.3322.org/dyndns/getip",
+  "log_path":"./godns.log",
+  "log_size":16,
+  "log_num":3
 }
diff --git a/godns.go b/godns.go
index d8aad46..07fc31d 100644
--- a/godns.go
+++ b/godns.go
@@ -36,13 +36,17 @@ func main() {
 			Email:      os.Getenv("EMAIL"),
 			Password:   os.Getenv("PASSWORD"),
 			LoginToken: os.Getenv("TOKEN"),
-			Domain:     os.Getenv("DOMAIN"),
-			SubDomain:  os.Getenv("SUB_DOMAIN"),
 			IPUrl:      "http://members.3322.org/dyndns/getip",
 			LogPath:    "./godns.log",
 			LogSize:    16,
 			LogNum:     3,
 		}
+
+		if err := LoadDomains(os.Getenv("DOMAINS"), &configuration.Domains); err != nil {
+			fmt.Println(err.Error())
+			log.Println(err.Error())
+			os.Exit(1)
+		}
 	} else {
 		//Load settings from configurations file
 		if err := LoadSettings(*optConf, &configuration); err != nil {
@@ -53,12 +57,12 @@ func main() {
 	}
 
 	if err := checkSettings(&configuration); err != nil {
-		log.Println("Settings is invalid! " + err.Error())
+		log.Println("Settings is invalid! ", err.Error())
 		os.Exit(1)
 	}
 
 	if err := InitLogger(configuration.LogPath, configuration.LogSize, configuration.LogNum); err != nil {
-		log.Println("InitLogger error:" + err.Error())
+		log.Println("InitLogger error:", err.Error())
 		os.Exit(1)
 	}
 
@@ -79,9 +83,18 @@ func dnsLoop() {
 		}
 	}()
 
+	for _, domain := range configuration.Domains {
+		go DomainLoop(&domain)
+	}
+
+	select {}
+}
+
+func DomainLoop(domain *Domain) {
+
 	for {
 
-		domainID := getDomain(configuration.Domain)
+		domainID := getDomain(domain.DomainName)
 
 		if domainID == -1 {
 			continue
@@ -93,22 +106,24 @@ func dnsLoop() {
 			log.Println("get_currentIP:", err)
 			continue
 		}
-
-		subDomainID, ip := getSubDomain(domainID, configuration.SubDomain)
-
-		if subDomainID == "" || ip == "" {
-			log.Println("sub_domain:", subDomainID, ip)
-			continue
-		}
-
 		log.Println("currentIp is:", currentIP)
 
-		//Continue to check the IP of sub-domain
-		if len(ip) > 0 && !strings.Contains(currentIP, ip) {
-			log.Println("Start to update record IP...")
-			updateIP(domainID, subDomainID, configuration.SubDomain, currentIP)
-		} else {
-			log.Println("Current IP is same as domain IP, no need to update...")
+		for _, subDomain := range domain.SubDomains {
+
+			subDomainID, ip := getSubDomain(domainID, subDomain)
+
+			if subDomainID == "" || ip == "" {
+				log.Printf("domain: %s.%s subDomainID: %s ip: %s\n", subDomain, domain.DomainName, subDomainID, ip)
+				continue
+			}
+
+			//Continue to check the IP of sub-domain
+			if len(ip) > 0 && !strings.Contains(currentIP, ip) {
+				log.Printf("%s.%s Start to update record IP...\n", subDomain, domain.DomainName)
+				updateIP(domainID, subDomainID, subDomain, currentIP)
+			} else {
+				log.Printf("%s.%s Current IP is same as domain IP, no need to update...\n", subDomain, domain.DomainName)
+			}
 		}
 
 		//Interval is 5 minutes
diff --git a/settings.go b/settings.go
index e27d510..ea5e968 100644
--- a/settings.go
+++ b/settings.go
@@ -4,19 +4,24 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
+	"strings"
 )
 
+type Domain struct {
+	DomainName string   `json:"domain_name"`
+	SubDomains []string `json:"sub_domains"`
+}
+
 //Settings struct
 type Settings struct {
-	Email      string `json:"email"`
-	Password   string `json:"password"`
-	LoginToken string `json:"login_token"`
-	Domain     string `json:"domain"`
-	SubDomain  string `json:"sub_domain"`
-	IPUrl      string `json:"ip_url"`
-	LogPath    string `json:"log_path"`
-	LogSize    int    `json:"log_size"`
-	LogNum     int    `json:"log_num"`
+	Email      string   `json:"email"`
+	Password   string   `json:"password"`
+	LoginToken string   `json:"login_token"`
+	Domains    []Domain `json:"domains"`
+	IPUrl      string   `json:"ip_url"`
+	LogPath    string   `json:"log_path"`
+	LogSize    int      `json:"log_size"`
+	LogNum     int      `json:"log_num"`
 }
 
 //LoadSettings -- Load settings from config file
@@ -36,3 +41,35 @@ func LoadSettings(configPath string, settings *Settings) error {
 
 	return nil
 }
+
+//LoadDomains -- Load domains from domains string
+func LoadDomains(domainsOrginStr string, domains *[]Domain) error {
+
+	domainsMap := make(map[string]*Domain)
+	domainsArray := strings.Split(domainsOrginStr, ",")
+	for _, host := range domainsArray {
+		dotCount := strings.Count(host, ".")
+		if dotCount < 2 {
+			continue
+		}
+		len := len(host)
+		pos := strings.Index(host, ".")
+		subDomain := host[0:pos]
+		domainName := host[pos+1 : len]
+
+		if d, exist := domainsMap[domainName]; exist {
+			d.SubDomains = append(d.SubDomains, subDomain)
+		} else {
+			d := new(Domain)
+			d.DomainName = domainName
+			d.SubDomains = append(d.SubDomains, subDomain)
+			domainsMap[domainName] = d
+		}
+	}
+
+	for _, d := range domainsMap {
+		*domains = append(*domains, *d)
+	}
+
+	return nil
+}