diff --git a/README.md b/README.md
index 14956fb..ef87f47 100644
--- a/README.md
+++ b/README.md
@@ -65,3 +65,11 @@
     - 취준생을 위한이면 취업에 필요한 단어를 추출해서 카테고리 만들기
     - ES 사용?
     - 추천하는 방식 → 단어 수 기반
+
+
+### 4. 남은 과업(wootaegyeoung)
+- 데이터베이스 연결
+    - 현재 mysql은 업로드 됨. 
+    - mongoDB 생성후 이미지로 만들어서 배포.
+
+- 사용자기반 추천 api 코드 생성
\ No newline at end of file
diff --git a/fastapi-server/app/db.py b/fastapi-server/app/db.py
index a921a2d..7c3c3e8 100644
--- a/fastapi-server/app/db.py
+++ b/fastapi-server/app/db.py
@@ -1,25 +1,4 @@
-from sqlalchemy import create_engine
-from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.orm import sessionmaker, scoped_session
+from motor.motor_asyncio import AsyncIOMotorClient
 
-user_name=""
-password=""
-db_host="127.0.0.1"
-db_name=""
-
-DATABASE='mysql://'+user_name+':'+password+'@'+db_host+'/'+db_name+"?charset=utf8"
-
-engine = create_engine(
-    DATABASE,
-    encoding='utf8',
-    echo=True)
-
-sesstion=scoped_session(
-    sessionmaker(
-        autocommit=False,
-        autoflush=False,
-        bind=engine
-    ))
-
-Base = declarative_base()
-Base.query = sesstion.query_property()
+client = AsyncIOMotorClient('mongodb://localhost:27017')
+db = client.news_database
diff --git a/fastapi-server/app/dto/RecommendDTO.py b/fastapi-server/app/dto/RecommendDTO.py
new file mode 100644
index 0000000..604378d
--- /dev/null
+++ b/fastapi-server/app/dto/RecommendDTO.py
@@ -0,0 +1,17 @@
+from typing import Optional, List
+
+from pydantic import BaseModel
+
+class NewsRecommendationDTO_Req(BaseModel):
+    name: str
+    user_category: List[float]
+    num : int
+
+
+    class Config:
+        arbitrary_types_allowed = True
+
+
+class recommend_news_similarity_InputData(BaseModel):
+    category_array: List[int]
+    top_n: int
diff --git a/fastapi-server/app/dto/userCategory.py b/fastapi-server/app/dto/userCategory.py
new file mode 100644
index 0000000..fea1f6a
--- /dev/null
+++ b/fastapi-server/app/dto/userCategory.py
@@ -0,0 +1,14 @@
+from typing import Optional, List
+
+from pydantic import BaseModel
+
+class UserUpdateDTO_Req(BaseModel):
+    name: str
+    user_category: List[float]
+    new_category: List[float]
+
+    class Config:
+        arbitrary_types_allowed = True
+
+class UserUpdateDTO_Res(BaseModel):
+    new_user_category: List[float]
diff --git a/fastapi-server/app/main.py b/fastapi-server/app/main.py
index 7d6d5a8..1edc98b 100644
--- a/fastapi-server/app/main.py
+++ b/fastapi-server/app/main.py
@@ -1,11 +1,25 @@
-from fastapi import FastAPI, Query
-from app.services.recommend import (
-    recommend_news, 
-    recommend_popular_news, 
-    recommend_based_on_demographics, 
-    recommend_based_on_new_words, 
+from random import random
+from typing import Optional
+
+import numpy as np
+import uvicorn
+from fastapi import FastAPI, Query, HTTPException
+from sklearn.metrics.pairwise import cosine_similarity
+
+from dto.RecommendDTO import NewsRecommendationDTO_Req, recommend_news_similarity_InputData
+from services.recommend_user_data import update_interest_vector, find_similar_items
+from dto.userCategory import UserUpdateDTO_Res, UserUpdateDTO_Req
+from services.recommend import (
+    recommend_news,
+    recommend_popular_news,
+    recommend_based_on_demographics,
+    recommend_based_on_new_words,
     recommend_for_job_seekers
 )
+from services.news_category_jsonStructure import *
+
+
+from services.searchNews import fetch_all_news
 
 app = FastAPI()
 
@@ -34,5 +48,67 @@ def job_seekers():
     recommendations = recommend_for_job_seekers()
     return {"recommendations": recommendations}
 
+
+
+
+# return all news
+@app.get("/news", response_model=List[Dict])
+async def get_news():
+    return await fetch_all_news(news_item_helper)
+
+# retrun category of each news
+@app.get("/news_category", response_model=List[Dict])
+async def get_news_category():
+    return await fetch_all_news(news_Category_helper)
+
+# @app.get("/news_recommendation", response_model=List[Dict])
+# async def get_news_recommendation(data : NewsRecommendationDTO_Req):
+#     #할일 : 현재 어떤 사용자의 어떤 부분을 반영할지를 정하지 않음. 이부분을 다시 반영해야할듯.
+#
+#     result=fetch_all_news(news_Category_helper)
+#     #할일 : 위의 결과를 처리해서 벡터만 있는 list로 변환해야함.
+#
+#     similar_item_indices, similar_item_scores= find_similar_items(data.user_category, result, top_n=data.num)
+#
+#     # 할일 : similar_item_indices로 뉴스 순서에 대한 검색을 진행해서 검색된 결과를 반환.
+#
+#     return
+
+@app.post("/news/recommend/similarity")
+async def recommend_news_similarity(input_data: recommend_news_similarity_InputData):
+    news_data=await fetch_all_news(news_Category_helper);
+    input_vector = np.array(input_data.category_array).reshape(1, -1)
+    news_vectors = np.array([news['category_array'] for news in news_data])
+    similarities = cosine_similarity(input_vector, news_vectors).flatten()
+    similar_news = sorted(zip(news_data, similarities), key=lambda x: x[1], reverse=True)
+    top_similar_news = similar_news[:input_data.top_n]
+    return [
+        {
+            "news_id": news[0]["news_id"],
+            "similarity": news[1]
+        } for news in top_similar_news
+    ]
+
+@app.get("/news/{news_id}/")
+async def get_news_by_id(news_id: str):
+    # news_id를 기반으로 뉴스 데이터 검색
+    for news in await fetch_all_news(news_item_helper):
+        if news["news_id"] == news_id:
+            return news
+    raise HTTPException(status_code=404, detail="News not found")
+
+# 사용자 카테고리 벡터와 뉴스 id를 기반으로 카테고리 벡터를 업데이트
+# 뉴스 아이디에서 벡터 추출과정 추가해야됨.
+@app.get("/news_user_update", response_model=UserUpdateDTO_Res)
+async def get_news_recommendation(data: UserUpdateDTO_Req):
+    response_data = UserUpdateDTO_Res(
+        new_user_category=update_interest_vector(data.user_category, data.new_category)
+    )
+    return response_data
+
+
+
+
+
 if __name__ == "__main__":
-    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
+    uvicorn.run("main:app", host="127.0.0.1", port=8000, reload=True)
diff --git a/fastapi-server/app/models/category.py b/fastapi-server/app/models/category.py
new file mode 100644
index 0000000..7899c89
--- /dev/null
+++ b/fastapi-server/app/models/category.py
@@ -0,0 +1,8 @@
+from typing import List
+
+from pydantic import BaseModel
+
+
+class NewsItemCategory(BaseModel):
+    news_id: str
+    category_array: List[int]
\ No newline at end of file
diff --git a/fastapi-server/app/models/news.py b/fastapi-server/app/models/news.py
new file mode 100644
index 0000000..e0323a4
--- /dev/null
+++ b/fastapi-server/app/models/news.py
@@ -0,0 +1,20 @@
+from datetime import datetime
+from typing import List, Optional
+
+from pydantic import BaseModel
+
+class NewsItem(BaseModel):
+    news_id: str
+    title: str
+    content: str
+    hilight: str
+    published_at: datetime
+    enveloped_at: datetime
+    dateline: datetime
+    provider: str
+    category: List[str]
+    category_incident: List[str]
+    byline: str
+    provider_link_page: str
+    printing_page: Optional[str] = None
+
diff --git a/fastapi-server/app/services/news_category_jsonStructure.py b/fastapi-server/app/services/news_category_jsonStructure.py
new file mode 100644
index 0000000..06b827b
--- /dev/null
+++ b/fastapi-server/app/services/news_category_jsonStructure.py
@@ -0,0 +1,42 @@
+from typing import List, Dict
+
+from pydantic import BaseModel
+
+CATEGORY_INDEX = {
+    "IT_과학>과학": 0,
+    "IT_과학>보안": 1,
+    "IT_과학>모바일": 2,
+    "IT_과학>콘텐츠": 3,
+    "IT_과학>인터넷_SNS": 4,
+    "IT_과학>IT_과학일반": 5
+}
+
+def category_to_array(categories: List[str]) -> List[int]:
+    array = [0] * len(CATEGORY_INDEX)
+    for category in categories:
+        if category in CATEGORY_INDEX:
+            array[CATEGORY_INDEX[category]] = 1
+    return array
+
+def news_Category_helper(news: Dict) -> Dict:
+    return {
+        "news_id": news.get("news_id", ""),
+        "category_array": category_to_array(news.get("category", []))
+    }
+
+def news_item_helper(news_item) -> dict:
+    return {
+        "news_id": news_item.get("news_id", ""),
+        "title": news_item.get("title", ""),
+        "content": news_item.get("content", ""),
+        "hilight": news_item.get("hilight", ""),
+        "published_at": news_item.get("published_at", ""),
+        "enveloped_at": news_item.get("enveloped_at", ""),
+        "dateline": news_item.get("dateline", ""),
+        "provider": news_item.get("provider", ""),
+        "category": news_item.get("category", []),
+        "category_incident": news_item.get("category_incident", []),
+        "byline": news_item.get("byline", ""),
+        "provider_link_page": news_item.get("provider_link_page", ""),
+        "printing_page": news_item.get("printing_page", ""),
+    }
diff --git a/fastapi-server/app/services/recommend.py b/fastapi-server/app/services/recommend.py
index 2e155d9..5c31c45 100644
--- a/fastapi-server/app/services/recommend.py
+++ b/fastapi-server/app/services/recommend.py
@@ -1,5 +1,5 @@
 from elasticsearch import Elasticsearch
-from app.config import ELASTICSEARCH_HOST
+from config import ELASTICSEARCH_HOST
 
 es = Elasticsearch([ELASTICSEARCH_HOST])
 
diff --git a/fastapi-server/app/services/recommend_user_data.py b/fastapi-server/app/services/recommend_user_data.py
new file mode 100644
index 0000000..f9e615a
--- /dev/null
+++ b/fastapi-server/app/services/recommend_user_data.py
@@ -0,0 +1,83 @@
+# 유저의 관심 카테고리 업데이트
+import numpy as np
+from sklearn.neighbors import NearestNeighbors
+
+#update interest Category
+def update_interest_vector(interest_vector, new_interests, increment=0.1, decrement=0.1):
+    for i in range(len(new_interests)):
+        if new_interests[i] == 1:
+            interest_vector[i] += increment
+    
+    interest_vector = np.minimum(interest_vector, 1.0)
+    
+    for i in range(len(interest_vector)):
+        if new_interests[i] == 0:
+            interest_vector[i] = (interest_vector[i] - decrement) ** 2
+    
+    return interest_vector
+
+# user_based recommendation, content_based recommendation
+def combine_vectors(keyword_vector, field_vector, media_vector):
+    keyword_vector_squared = np.square(keyword_vector)
+    field_vector_squared = np.square(field_vector)
+    media_vector_squared = np.square(media_vector)
+    return np.concatenate((keyword_vector, field_vector, media_vector))
+
+def find_similar_items(target_item_vectors, all_item_vectors, top_n=5):
+    combined_all_item_vectors = [combine_vectors(*item_vectors) for item_vectors in all_item_vectors]
+    combined_target_item_vector = combine_vectors(*target_item_vectors)
+    
+    nbrs = NearestNeighbors(n_neighbors=top_n, algorithm='auto', metric='cosine').fit(combined_all_item_vectors)
+    distances, indices = nbrs.kneighbors([combined_target_item_vector])
+    similar_item_scores = 1 - distances[0]
+    
+    return indices[0], similar_item_scores
+
+# ------update_interest_vector 사용예시
+
+# interest_vector = np.array([1.0, 0.5, 0.8])
+# new_interests = np.array([0, 1, 0])
+# interest_vector = update_interest_vector(interest_vector, new_interests)
+# print(interest_vector)  # [0.81, 0.6, 0.49]
+
+# new_interests = np.array([1, 0, 1])
+# interest_vector = update_interest_vector(interest_vector, new_interests)
+# print(interest_vector)  # [0.91, 0.25, 0.59]
+
+
+#------combine_vectors, find_similar_items 사용예시
+# target_keyword_vector = np.random.rand(5)
+# target_field_vector = np.random.rand(3)
+# target_media_vector = np.random.rand(4)
+
+# all_item_vectors = [
+#     (np.random.rand(5), np.random.rand(3), np.random.rand(4)) for _ in range(1000)
+# ]
+
+# similar_item_indices, similar_item_scores = find_similar_items(
+#     (target_keyword_vector, target_field_vector, target_media_vector),
+#     all_item_vectors,
+#     top_n=5
+# )
+
+# print("유사한 아이템 인덱스 (유사도 순):", similar_item_indices)
+# print("유사한 아이템들의 유사도 점수:", similar_item_scores)
+
+# target_keyword_vector = np.random.rand(5)
+# target_field_vector = np.random.rand(3)
+# target_media_vector = np.random.rand(4)
+
+# all_item_vectors = [
+#     (np.random.rand(5), np.random.rand(3), np.random.rand(4)) for _ in range(1000)
+# ]
+
+# similar_item_indices, similar_item_scores = find_similar_items(
+#     (target_keyword_vector, target_field_vector, target_media_vector),
+#     all_item_vectors,
+#     top_n=5
+# )
+
+# print("유사한 아이템 인덱스 (유사도 순):", similar_item_indices)
+# print("유사한 아이템들의 유사도 점수:", similar_item_scores)
+
+
diff --git a/fastapi-server/app/services/searchNews.py b/fastapi-server/app/services/searchNews.py
new file mode 100644
index 0000000..2920ec1
--- /dev/null
+++ b/fastapi-server/app/services/searchNews.py
@@ -0,0 +1,22 @@
+from http.client import HTTPException
+from typing import List, Dict
+
+from db import db
+
+
+async def fetch_all_news(helper_func) -> List[Dict]:
+    news_collection = db.news_collection
+    news_documents = await news_collection.find().to_list(None)
+    if news_documents:
+        return [helper_func(news) for doc in news_documents for news in doc.get("documents", [])]
+    else:
+        raise HTTPException(status_code=404, detail="News items not found")
+
+
+async def fetch_find_news(helper_func, ars) -> List[Dict]:
+    news_collection = db.news_collection
+    news_documents = await news_collection.find().to_list(None)
+    if news_documents:
+        return [helper_func(news) for doc in news_documents for news in doc.get("documents", [])]
+    else:
+        raise HTTPException(status_code=404, detail="News items not found")
\ No newline at end of file