diff --git a/public_html/assets/api/install.php b/public_html/assets/api/install.php
index 9fa3861..fb7048a 100644
--- a/public_html/assets/api/install.php
+++ b/public_html/assets/api/install.php
@@ -1122,7 +1122,7 @@ trait InstallAPI {
             qry($sql);
         }
 
-        // 
+        // 최초 install
         if ($install_date) {
 
             $install_yyyymmdd = str_replace('-', '', $install_date);
@@ -1142,22 +1142,57 @@ trait InstallAPI {
             }
         }
 
+        // c_exchangedate: 최신 install_date 또는 pickup_date
+        $exchangeDates = [];
+
+        if ($install_date) {
+            $exchangeDates[] = str_replace('-', '', $install_date);
+        }
+
         if ($pickup_date) {
+            $exchangeDates[] = str_replace('-', '', $pickup_date);
+        }
 
-            $pickup_yyyymmdd = str_replace('-', '', $pickup_date);
+        if (!empty($exchangeDates)) {
+            rsort($exchangeDates);
+            $latestExchangeDate = $exchangeDates[0];
 
-            $r = qry("SELECT c_removaldate FROM tbl_customer WHERE c_uid='{$c_uid}'");
-            $row = mysqli_fetch_assoc($r);
-            $current = $row['c_removaldate'];
+            qry("
+                UPDATE tbl_customer
+                SET c_exchangedate = '{$latestExchangeDate}'
+                WHERE c_uid = '{$c_uid}'
+            ");
+        }
 
-            if (!$current || $current === 'N/A' || $pickup_yyyymmdd > $current) {
+        // c_removaldate: 작업 후 active container가 하나도 없으면 최종 수거일 업데이트
+        // 반대로 active container가 있으면 c_removaldate 초기화
+        $r = qry("
+            SELECT COUNT(*) AS active_cnt
+            FROM tbl_customer_container
+            WHERE cc_customer_uid = '{$c_uid}'
+            AND cc_status = 'A'
+        ");
+
+        $row = mysqli_fetch_assoc($r);
+        $activeCnt = (int)($row['active_cnt'] ?? 0);
+
+        if ($activeCnt === 0) {
+            if ($pickup_date) {
+                $pickup_yyyymmdd = str_replace('-', '', $pickup_date);
 
                 qry("
                     UPDATE tbl_customer
-                    SET c_removaldate='{$pickup_yyyymmdd}'
-                    WHERE c_uid='{$c_uid}'
+                    SET c_removaldate = '{$pickup_yyyymmdd}'
+                    WHERE c_uid = '{$c_uid}'
                 ");
             }
+        } else {
+            qry("
+                UPDATE tbl_customer
+                SET c_removaldate = ''
+                WHERE c_uid = '{$c_uid}'
+                    and c_removaldate <> ''
+            ");
         }
 
 
diff --git a/public_html/doc/map.php b/public_html/doc/map.php
index e784c30..ca2986c 100644
--- a/public_html/doc/map.php
+++ b/public_html/doc/map.php
@@ -2608,7 +2608,7 @@ function popup(){
       fd.append('actionStr', 'ADDIMAGE');
       fd.append('i_type', 'install_order');
       fd.append('i_customeruid', SimpleInstall.customer_uid);
-      fd.append('i_memberuid', SimpleInstall.driver_uid);
+      fd.append('i_memberuid', SimpleInstall.member_uid);
       fd.append('i_note', $installNote);
       fd.append('i_sourceuid', iw_uid);