diff --git a/src/main/java/com/loafle/overflow/module/infra/service/InfraHostService.java b/src/main/java/com/loafle/overflow/module/infra/service/InfraHostService.java
index c81239d..02a134f 100644
--- a/src/main/java/com/loafle/overflow/module/infra/service/InfraHostService.java
+++ b/src/main/java/com/loafle/overflow/module/infra/service/InfraHostService.java
@@ -19,7 +19,7 @@ public class InfraHostService {
         return this.infraHostDAO.save(infraHost);
     }
 
-    public InfraHost read(String id) {
-        return this.infraHostDAO.findOne(Long.valueOf(id));
+    public InfraHost read(long id) {
+        return this.infraHostDAO.findOne(id);
     }
 }
diff --git a/src/main/java/com/loafle/overflow/module/infra/service/InfraService.java b/src/main/java/com/loafle/overflow/module/infra/service/InfraService.java
index 3fc6182..f154a99 100644
--- a/src/main/java/com/loafle/overflow/module/infra/service/InfraService.java
+++ b/src/main/java/com/loafle/overflow/module/infra/service/InfraService.java
@@ -19,8 +19,8 @@ public class InfraService {
         return this.infraDAO.save(infra);
     }
 
-    public Infra read(String id) {
-        return this.infraDAO.findOne(Long.valueOf(id));
+    public Infra read(long id) {
+        return this.infraDAO.findOne(id);
     }
 
 }
diff --git a/src/test/java/com/loafle/overflow/module/infra/service/InfraHostServiceTest.java b/src/test/java/com/loafle/overflow/module/infra/service/InfraHostServiceTest.java
index 0e09695..9471d1b 100644
--- a/src/test/java/com/loafle/overflow/module/infra/service/InfraHostServiceTest.java
+++ b/src/test/java/com/loafle/overflow/module/infra/service/InfraHostServiceTest.java
@@ -5,6 +5,7 @@ import com.loafle.overflow.module.infra.model.InfraOS;
 import com.loafle.overflow.spring.AppConfig;
 import com.loafle.overflow.spring.JdbcConfiguration;
 import com.loafle.overflow.spring.MailConfiguration;
+import org.codehaus.jackson.map.ObjectMapper;
 import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -45,6 +46,14 @@ public class InfraHostServiceTest {
 
     @Test
     public void read() throws Exception {
+
+        InfraHost infraHost = this.infraHostService.read(1);
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        String json  = objectMapper.writeValueAsString(infraHost);
+
+        System.out.println(json);
+
     }
 
 }
\ No newline at end of file
diff --git a/src/test/java/com/loafle/overflow/module/infra/service/InfraServiceTest.java b/src/test/java/com/loafle/overflow/module/infra/service/InfraServiceTest.java
index fa2d1b7..95813a1 100644
--- a/src/test/java/com/loafle/overflow/module/infra/service/InfraServiceTest.java
+++ b/src/test/java/com/loafle/overflow/module/infra/service/InfraServiceTest.java
@@ -8,6 +8,7 @@ import com.loafle.overflow.module.target.model.Target;
 import com.loafle.overflow.spring.AppConfig;
 import com.loafle.overflow.spring.JdbcConfiguration;
 import com.loafle.overflow.spring.MailConfiguration;
+import org.codehaus.jackson.map.ObjectMapper;
 import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -69,6 +70,13 @@ public class InfraServiceTest {
 
     @Test
     public void read() throws Exception {
+
+        Infra infra = this.infraService.read(3);
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        String json = objectMapper.writeValueAsString(infra);
+
+        System.out.println(json);
     }
 
 }
\ No newline at end of file