diff --git a/client/src/components/Footer.js b/client/src/components/Footer.js
index 9c1edd7b5b37adc00eef306fbe493b3873be4974..400fa1368ed553cdf9a6460a7e6be1389ce127cf 100644
--- a/client/src/components/Footer.js
+++ b/client/src/components/Footer.js
@@ -11,7 +11,8 @@ function Footer() {
                 style={{ fontSize: '0.8em' }}>
                 <hr />
                 <Col style={{ display: 'flex', color: 'gray', fontWeight: '300', alignItems: 'center', justifyContent: 'center' }}>
-                    © 2021 TEAM EUE. All rights reserved
+                    © 2021 TEAM EUE. All rights reserved <br />
+                    문의 : dev0gomgom@gmail.com
                 </Col>
                 <Col>
                     <a href='https://www.notion.so/EUE-047f1812c6c24096a528dfd3330c227d'
@@ -20,7 +21,9 @@ function Footer() {
                         <strong>
                             TEAM EUE
                         </strong>
-                    </a> <br />안강민, 박상호, 박예은
+                    </a>
+                    <br />
+                    안강민, 박상호, 박예은
                 </Col>
             </Row>
         </Container >
diff --git a/client/src/components/LoginComp.js b/client/src/components/LoginComp.js
index 4b0b7e717607eec914581b09c2799d22e2795f29..0a176538dc795d92ed97e34ce1eaea844aae78d1 100644
--- a/client/src/components/LoginComp.js
+++ b/client/src/components/LoginComp.js
@@ -40,7 +40,7 @@ function LoginComp() {
             const newLink = 'https://www.' + afterAt;
             window.location.replace(newLink);
         }
-        else if (afterAt == 'korea.ac.kr') {
+        if (afterAt === 'korea.ac.kr') {
             window.location.replace('https://www.gmail.com');
         }
     }
diff --git a/client/src/components/UsingAircon.js b/client/src/components/UsingAircon.js
index 72e3a5088a64e6672dba85fc4da6dfbf2e4a6d31..e0914818845359f057b11753eb054d8e00a81a0d 100644
--- a/client/src/components/UsingAircon.js
+++ b/client/src/components/UsingAircon.js
@@ -17,7 +17,9 @@ function UsingAircon() {
 
   useEffect(() => {
     callUserInfo().then((res) => {
-      setAirUsing(res[0]['using_aircon'])
+      if (isLogined()) {
+        setAirUsing(res[0]['using_aircon'])
+      }
     })
   }, [])