diff --git a/src/main/java/treehouse/server/api/invitation/business/InvitationService.java b/src/main/java/treehouse/server/api/invitation/business/InvitationService.java
index cce16e2..1ebae1b 100644
--- a/src/main/java/treehouse/server/api/invitation/business/InvitationService.java
+++ b/src/main/java/treehouse/server/api/invitation/business/InvitationService.java
@@ -118,7 +118,7 @@ public InvitationResponseDTO.invitationAccept decisionInvitation(User user, Invi
         if (request.isAcceptDecision()==true) {
             treehouseId = invitation.getTreeHouse().getId(); // treehouse 관련 로직 개발 후, invitation.getTreeHouse.getId() 등으로 바꾸기
             // 초대장 수락
-
+            invitationCommandAdapter.acceptInvitation(invitation);
         }
         return InvitationMapper.toInvitationResult(treehouseId);
     }
diff --git a/src/main/java/treehouse/server/api/invitation/implement/InvitationCommandAdapter.java b/src/main/java/treehouse/server/api/invitation/implement/InvitationCommandAdapter.java
index dc1818c..8f75e93 100644
--- a/src/main/java/treehouse/server/api/invitation/implement/InvitationCommandAdapter.java
+++ b/src/main/java/treehouse/server/api/invitation/implement/InvitationCommandAdapter.java
@@ -6,6 +6,7 @@
 import treehouse.server.api.invitation.persistence.InvitationRepository;
 import treehouse.server.global.annotations.Adapter;
 import treehouse.server.global.entity.Invitation.Invitation;
+import treehouse.server.global.entity.Invitation.InvitationStatus;
 import treehouse.server.global.entity.User.User;
 import treehouse.server.global.entity.User.UserRole;
 import treehouse.server.global.entity.redis.RefreshToken;
@@ -27,4 +28,12 @@ public Invitation saveInvitation(Invitation invitation){
         return invitationRepository.save(invitation);
     }
 
+    public void deleteInvitation(Invitation invitation){
+        invitationRepository.delete(invitation);
+    }
+
+    public void acceptInvitation(Invitation invitation) {
+        invitation.setStatus(InvitationStatus.ACCEPTED);
+        invitationRepository.save(invitation);
+    }
 }
diff --git a/src/main/java/treehouse/server/api/invitation/implement/InvitationQueryAdapter.java b/src/main/java/treehouse/server/api/invitation/implement/InvitationQueryAdapter.java
index f6c4d64..9139083 100644
--- a/src/main/java/treehouse/server/api/invitation/implement/InvitationQueryAdapter.java
+++ b/src/main/java/treehouse/server/api/invitation/implement/InvitationQueryAdapter.java
@@ -1,20 +1,16 @@
 package treehouse.server.api.invitation.implement;
 
-import io.swagger.models.auth.In;
 import lombok.RequiredArgsConstructor;
-import org.springframework.transaction.annotation.Transactional;
 import treehouse.server.api.invitation.persistence.InvitationRepository;
-import treehouse.server.api.invitation.presentation.dto.InvitationRequestDTO;
 import treehouse.server.global.annotations.Adapter;
 import treehouse.server.global.entity.Invitation.Invitation;
+import treehouse.server.global.entity.Invitation.InvitationStatus;
 import treehouse.server.global.entity.User.User;
 import treehouse.server.global.entity.treeHouse.TreeHouse;
 import treehouse.server.global.exception.GlobalErrorCode;
 import treehouse.server.global.exception.ThrowClass.InvitationException;
-import treehouse.server.global.exception.ThrowClass.UserException;
 
 import java.util.List;
-import java.util.Optional;
 
 @Adapter
 @RequiredArgsConstructor
@@ -23,7 +19,8 @@ public class InvitationQueryAdapter {
     private final InvitationRepository invitationRepository;
 
     public List<Invitation> findAllByPhone(String phone) {
-        return invitationRepository.findAllByPhone(phone);
+        return invitationRepository.findAllByPhone(phone)
+                .stream().filter(invitation -> invitation.getStatus().equals(InvitationStatus.PENDING)).toList();
     }
 
     public Boolean existByPhoneNumber(String phoneNumber) {
@@ -39,12 +36,13 @@ public Boolean existByPhoneAndTreehouse(String phoneNumber, TreeHouse treehouse)
         return invitationRepository.existsByPhoneAndTreeHouse(phoneNumber, treehouse);
     }
 
-    public Invitation findByReceiverAndTreeHouse(User user, TreeHouse treeHouse) {
-        return invitationRepository.findByReceiverAndTreeHouse(user, treeHouse)
-                .orElseThrow(() -> new InvitationException(GlobalErrorCode.INVITATION_NOT_FOUND));
-    }
-
     public Invitation findByPhoneAndTreeHouse(String phone, TreeHouse treeHouse) {
         return invitationRepository.findByPhoneAndTreeHouse(phone, treeHouse);
     }
+
+    public Invitation findAcceptedInvitation(User user, TreeHouse treeHouse) {
+        return invitationRepository.findByReceiverAndTreeHouse(user, treeHouse)
+                .filter(invitation -> invitation.getStatus().equals(InvitationStatus.ACCEPTED))
+                .orElseThrow(() -> new InvitationException(GlobalErrorCode.INVITATION_NOT_FOUND));
+    }
 }
diff --git a/src/main/java/treehouse/server/api/member/business/MemberService.java b/src/main/java/treehouse/server/api/member/business/MemberService.java
index 37fca9a..8e9cf3f 100644
--- a/src/main/java/treehouse/server/api/member/business/MemberService.java
+++ b/src/main/java/treehouse/server/api/member/business/MemberService.java
@@ -6,6 +6,7 @@
 import org.springframework.transaction.annotation.Transactional;
 import treehouse.server.api.branch.business.BranchService;
 import treehouse.server.api.branch.implementation.BranchQueryAdapter;
+import treehouse.server.api.invitation.implement.InvitationCommandAdapter;
 import treehouse.server.api.invitation.implement.InvitationQueryAdapter;
 import treehouse.server.api.member.implementation.MemberCommandAdapter;
 import treehouse.server.api.member.implementation.MemberQueryAdapter;
@@ -13,6 +14,7 @@
 import treehouse.server.api.member.presentation.dto.MemberResponseDTO;
 import treehouse.server.api.treehouse.implementation.TreehouseQueryAdapter;
 import treehouse.server.global.entity.Invitation.Invitation;
+import treehouse.server.global.entity.Invitation.InvitationStatus;
 import treehouse.server.global.entity.User.User;
 import treehouse.server.global.entity.branch.Branch;
 import treehouse.server.global.entity.member.Member;
@@ -30,6 +32,8 @@ public class MemberService {
     private final MemberCommandAdapter memberCommandAdapter;
     private final TreehouseQueryAdapter treehouseQueryAdapter;
     private final BranchQueryAdapter branchQueryAdapter;
+
+    private final InvitationCommandAdapter invitationCommandAdapter;
     private final InvitationQueryAdapter invitationQueryAdapter;
 
     private final BranchService branchService;
@@ -50,8 +54,8 @@ public MemberResponseDTO.registerMember register(User user, MemberRequestDTO.reg
         treeHouse.addMember(savedMember); // TreeHouse에 Member 추가
 
         // 트리하우스에 초대한 멤버와의 브랜치 생성
-        Invitation invitation = invitationQueryAdapter.findByReceiverAndTreeHouse(user, treeHouse);
-        branchService.createBranch(treeHouse, invitation.getSender(), savedMember);
+        Invitation acceptedInvitation = invitationQueryAdapter.findAcceptedInvitation(user, treeHouse);
+        branchService.createBranch(treeHouse, acceptedInvitation.getSender(), savedMember);
 
         return MemberMapper.toRegister(savedMember);
     }
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index f331f9d..8d749d3 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -73,8 +73,8 @@ jwt:
     key: ${JWT_SECRET}
   #  secret : ${JWT_SECRET}
   authorities-key: authoritiesKey
-  access-token-validity-in-seconds: 180000 # 3 min
-  refresh-token-validity-in-seconds: 600000 # 5 min
+  access-token-validity-in-seconds: 600000 # 10 min
+  refresh-token-validity-in-seconds: 1200000 # 20 min
 
 firebase:
   admin-sdk: ${FCM_KEY}