diff --git a/.gitignore b/.gitignore
index b986ce5..ffd97e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,8 +33,5 @@ lerna-debug.log*
 !.vscode/launch.json
 !.vscode/extensions.json
 
-#auth secrets
-/src/constants.ts
-
 #env file
 .env
\ No newline at end of file
diff --git a/src/auth/auth.module.ts b/src/auth/auth.module.ts
index 5c9cdbb..5b3b27a 100644
--- a/src/auth/auth.module.ts
+++ b/src/auth/auth.module.ts
@@ -5,20 +5,33 @@ import { JwtStrategy } from './jwt.strategy';
 import { UsersModule } from '../users/users.module';
 import { PassportModule } from '@nestjs/passport';
 import { JwtModule } from '@nestjs/jwt';
-import { jwtConstants } from 'src/constants';
-import { APP_GUARD } from '@nestjs/core';
 import { RoleGuard } from './role.guard';
+import { ConfigService } from '@nestjs/config';
 
 @Module({
   imports: [
     UsersModule,
     PassportModule,
-    JwtModule.register({
-      secret: jwtConstants.secret,
-      signOptions: { expiresIn: '60s' }, //60초 이후 토큰만료
+    //.env에서 값 사용을 위함.
+    JwtModule.registerAsync({
+      useFactory: (configService: ConfigService) => {
+        return {
+          secret: configService.get<string>('jwtConstants.secret'),
+          signOptions: {
+            expiresIn: configService.get<string | number>('expirationTime'),
+          },
+        };
+      },
+      inject: [ConfigService],
     }),
   ],
-  providers: [AuthService, LocalStrategy, JwtStrategy, RoleGuard],
+  providers: [
+    AuthService,
+    LocalStrategy,
+    JwtStrategy,
+    RoleGuard,
+    ConfigService,
+  ],
   exports: [AuthService],
 })
 export class AuthModule {}
diff --git a/src/auth/jwt.strategy.ts b/src/auth/jwt.strategy.ts
index 6c3cfe7..d1ca999 100644
--- a/src/auth/jwt.strategy.ts
+++ b/src/auth/jwt.strategy.ts
@@ -1,15 +1,15 @@
 import { ExtractJwt, Strategy } from 'passport-jwt';
 import { PassportStrategy } from '@nestjs/passport';
 import { Injectable } from '@nestjs/common';
-import { jwtConstants } from 'src/constants';
+import { ConfigService } from '@nestjs/config';
 
 @Injectable()
 export class JwtStrategy extends PassportStrategy(Strategy) {
-  constructor() {
+  constructor(private readonly configService: ConfigService) {
     super({
       jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
       ignoreExpiration: false,
-      secretOrKey: jwtConstants.secret,
+      secretOrKey: configService.get<string>('jwtConstants.secret'),
     });
   }
 
diff --git a/src/config/configuration.ts b/src/config/configuration.ts
index 770dded..c7dd547 100644
--- a/src/config/configuration.ts
+++ b/src/config/configuration.ts
@@ -7,4 +7,11 @@ export default () => ({
     password: process.env.DATABASE_PASSWORD || '',
     port: process.env.DATABASE_PORT || '',
   },
+  jwtConstants: {
+    secret: process.env.JWT_SECRET_KEY || '',
+  },
+  bcryptConstant: {
+    saltOrRounds: Number(process.env.BCRYPT_CONSTANT_VALUE),
+  },
+  expirationTime: process.env.JWT_EXPIRATION_TIME,
 });
diff --git a/src/users/users.module.ts b/src/users/users.module.ts
index f8cc930..3f4775d 100644
--- a/src/users/users.module.ts
+++ b/src/users/users.module.ts
@@ -1,10 +1,11 @@
 import { Module } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { User } from './entities/user.entity';
 import { UsersService } from './users.service';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([User])],
+  imports: [TypeOrmModule.forFeature([User]), ConfigService],
   providers: [UsersService],
   exports: [UsersService],
 })
diff --git a/src/users/users.service.ts b/src/users/users.service.ts
index 4813288..5c696b7 100644
--- a/src/users/users.service.ts
+++ b/src/users/users.service.ts
@@ -4,9 +4,9 @@ import { Repository } from 'typeorm';
 import { CreateUserDto } from './dto/create-user.dto';
 import { User } from './entities/user.entity';
 import * as bcrypt from 'bcrypt';
-import { bcryptConstant } from 'src/constants';
 import { LoginUserDto } from './dto/login-user.dto';
 import { UpdateUserDto } from './dto/update-user.dto';
+import { ConfigService } from '@nestjs/config';
 
 @Injectable()
 export class UsersService {
@@ -16,6 +16,7 @@ export class UsersService {
     //Test 할 때 Repository만 바꿔주면 testDB에 쿼리를 날릴 수 있어서 편리하다.
     @InjectRepository(User)
     private usersRepository: Repository<User>,
+    private configservice: ConfigService,
   ) {}
 
   async findOne(userId: string) {
@@ -82,7 +83,7 @@ export class UsersService {
 
     const hashedPassword = await bcrypt.hash(
       userData.userPassword,
-      bcryptConstant.saltOrRounds,
+      this.configservice.get('bcryptConstant.saltOrRounds'),
     );
     await this.usersRepository.save({
       //usersRepository.save가 DB에 저장시키는거
@@ -93,7 +94,7 @@ export class UsersService {
   }
   // 회원 삭제 logic
   async deleteUser(deleteData: LoginUserDto) {
-    const isMatch = this.checkLoginData(deleteData);
+    const isMatch = await this.checkLoginData(deleteData);
     if (isMatch) {
       return await this.usersRepository.delete({ userId: deleteData.userId });
     } else {
@@ -117,7 +118,7 @@ export class UsersService {
       else {
         const hashedPassword = await bcrypt.hash(
           updateData.userPassword,
-          bcryptConstant.saltOrRounds,
+          this.configservice.get('bcryptConstant.saltOrRounds'),
         );
         updateData.userPassword = hashedPassword;
       }