diff --git a/src/main/java/com/coderder/colorMeeting/controller/ScheduleController.java b/src/main/java/com/coderder/colorMeeting/controller/ScheduleController.java
index 30221e1..246aeb3 100644
--- a/src/main/java/com/coderder/colorMeeting/controller/ScheduleController.java
+++ b/src/main/java/com/coderder/colorMeeting/controller/ScheduleController.java
@@ -3,7 +3,6 @@
 import com.coderder.colorMeeting.config.auth.PrincipalDetails;
 import com.coderder.colorMeeting.dto.request.ScheduleRequestDto;
 import com.coderder.colorMeeting.dto.request.TeamScheduleRequestDto;
-import com.coderder.colorMeeting.dto.request.TeamTimeDto;
 import com.coderder.colorMeeting.dto.response.*;
 import com.coderder.colorMeeting.service.ScheduleService;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -65,11 +64,11 @@ public ResponseEntity<List<PersonalScheduleListDto>> getTeamUserAllSchedule(@Req
         return ResponseEntity.ok().body(scheduleBlockDtoList);
     }
     @GetMapping("/api/schedule/recommendations")
-    public ResponseEntity<ScheduleListDto> getRecommendations(@RequestBody TeamTimeDto teamTimeDto){
-        List<ScheduleBlockDto> recommendationList = scheduleService.getTeamEmptyTimes(teamTimeDto);
-        ScheduleListDto scheduleListDto = ScheduleListDto.builder()
-                .schedule(recommendationList).build();
-        return ResponseEntity.ok().body(scheduleListDto);
+    public ResponseEntity<RandomRecommendationDto> getRecommendations(
+            @RequestParam Long teamId,
+            @RequestParam Integer spanTime){
+        RandomRecommendationDto randomRecommendationDto = scheduleService.getRandomRecommandation(teamId, spanTime);
+        return ResponseEntity.ok().body(randomRecommendationDto);
     }
     @PostMapping("/api/schedule/teamschedule")
     public ResponseEntity<ResponseMessage> makeTeamSchedule(@RequestParam Long teamId, @RequestBody TeamScheduleRequestDto teamScheduleDto){
diff --git a/src/main/java/com/coderder/colorMeeting/dto/request/TeamTimeDto.java b/src/main/java/com/coderder/colorMeeting/dto/request/TeamTimeDto.java
index a79aff5..5657a82 100644
--- a/src/main/java/com/coderder/colorMeeting/dto/request/TeamTimeDto.java
+++ b/src/main/java/com/coderder/colorMeeting/dto/request/TeamTimeDto.java
@@ -1,8 +1,11 @@
 package com.coderder.colorMeeting.dto.request;
 
+import lombok.AllArgsConstructor;
+import lombok.Data;
 import lombok.Getter;
 
 @Getter
+@AllArgsConstructor
 public class TeamTimeDto {
     private Long teamId;
     private int spendingMinute;
diff --git a/src/main/java/com/coderder/colorMeeting/dto/response/AvailableScheduleDto.java b/src/main/java/com/coderder/colorMeeting/dto/response/AvailableScheduleDto.java
new file mode 100644
index 0000000..6f9a0a0
--- /dev/null
+++ b/src/main/java/com/coderder/colorMeeting/dto/response/AvailableScheduleDto.java
@@ -0,0 +1,14 @@
+package com.coderder.colorMeeting.dto.response;
+
+import com.coderder.colorMeeting.model.Member;
+import lombok.Getter;
+import lombok.experimental.SuperBuilder;
+import net.bytebuddy.implementation.bind.annotation.Super;
+
+import java.util.List;
+
+@SuperBuilder
+@Getter
+public class AvailableScheduleDto extends ScheduleBlockDto{
+    private List<Member> availableMember;
+}
diff --git a/src/main/java/com/coderder/colorMeeting/dto/response/RandomRecommendationDto.java b/src/main/java/com/coderder/colorMeeting/dto/response/RandomRecommendationDto.java
new file mode 100644
index 0000000..72370bf
--- /dev/null
+++ b/src/main/java/com/coderder/colorMeeting/dto/response/RandomRecommendationDto.java
@@ -0,0 +1,14 @@
+package com.coderder.colorMeeting.dto.response;
+
+import lombok.Builder;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+@Builder
+public class RandomRecommendationDto {
+    private String start;
+    private String end;
+    private List<String> memberNickNames;
+}
diff --git a/src/main/java/com/coderder/colorMeeting/etc/ScheduleCalendar.java b/src/main/java/com/coderder/colorMeeting/etc/ScheduleCalendar.java
new file mode 100644
index 0000000..f2c857f
--- /dev/null
+++ b/src/main/java/com/coderder/colorMeeting/etc/ScheduleCalendar.java
@@ -0,0 +1,157 @@
+package com.coderder.colorMeeting.etc;
+
+import com.coderder.colorMeeting.dto.response.AvailableScheduleDto;
+import com.coderder.colorMeeting.model.Member;
+import com.coderder.colorMeeting.model.PersonalSchedule;
+import lombok.AllArgsConstructor;
+
+import java.time.LocalTime;
+import java.util.*;
+
+@AllArgsConstructor
+public class ScheduleCalendar {
+    private List<List<Set<Member>>> calendar;
+    private List<Member> teamMembers;
+
+    public static ScheduleCalendar createCalendar(List<PersonalSchedule> teamSchedules, List<Member> members, int hourDividedBy) {
+        List<List<Set<Member>>> calendar = new ArrayList<>();
+        for(int i=0; i<7; i++){
+            List<Set<Member>> list = new ArrayList<>();
+            for(int j=0; j<24*hourDividedBy; j++){
+                list.add(new HashSet<>());
+            }
+            calendar.add(list);
+        }
+
+        for(PersonalSchedule schedule : teamSchedules){
+            List<Set<Member>> list = calendar.get(convertWeekday(schedule.getWeekday()));
+            int startIndex = convertTime(schedule.getStartTime(), hourDividedBy);
+            int endIndex = convertTime(schedule.getFinishTime().minusMinutes(1), hourDividedBy);
+            for(int i=startIndex; i<=endIndex; i++){
+                list.get(i).add(schedule.getMember());
+            }
+        }
+        //members can change!!!
+        return new ScheduleCalendar(calendar, members);
+    }
+    private static int convertWeekday(String weekday){
+        if(weekday.equalsIgnoreCase("mon") || weekday.equalsIgnoreCase("monday")) return 0;
+        else if(weekday.equalsIgnoreCase("tue") || weekday.equalsIgnoreCase("tuesday")) return 1;
+        else if(weekday.equalsIgnoreCase("wed") || weekday.equalsIgnoreCase("wednesday")) return 2;
+        else if(weekday.equalsIgnoreCase("thu") || weekday.equalsIgnoreCase("thursday")) return 3;
+        else if(weekday.equalsIgnoreCase("fri") || weekday.equalsIgnoreCase("friday")) return 4;
+        else if(weekday.equalsIgnoreCase("sat") || weekday.equalsIgnoreCase("saturday")) return 5;
+        else if(weekday.equalsIgnoreCase("sun") || weekday.equalsIgnoreCase("sunday")) return 6;
+        else return -1;
+    }
+    private static int convertTime(LocalTime time, int timeInterval){
+        int min = time.getMinute();
+        int hour = time.getHour();
+        int blockIndex = hour*timeInterval + (min / (60/timeInterval));
+        return blockIndex;
+    }
+
+    private static int convertTime(String time, int timeInterval){
+        int min = Integer.parseInt(time.split(":")[1]);
+        int hour = Integer.parseInt(time.split(":")[0]);
+        int blockIndex = hour*timeInterval + (min / (60/timeInterval));
+        return blockIndex;
+    }
+
+    private String convertToWeekday(int weekday){
+        if(weekday == 0) return "mon";
+        else if(weekday == 1) return "tue";
+        else if(weekday == 2) return "wed";
+        else if(weekday == 3) return "thu";
+        else if(weekday == 4) return "fri";
+        else if(weekday == 5) return "sat";
+        else if(weekday == 6) return "sun";
+        else return "";
+    }
+    private LocalTime convertToTime(int timeBlock, int timeInterval){
+        return LocalTime.of(timeBlock/timeInterval
+                , (timeBlock%timeInterval)*(60/timeInterval));
+    }
+
+
+    public List<AvailableScheduleDto> getMostAvailableList(Integer spanTime, Integer hourDividedBy) {
+        Integer maxNum = 0;
+        Integer requiredBlockNum = spanTime / (60/hourDividedBy);
+        System.out.println(requiredBlockNum);
+        //then, start,end time would be start only by "hourDividedBy"
+
+        //count continuous blocks(value) per member(key)
+        Map<Member, Integer> memberCounter = new HashMap<>();
+
+        initializeCounter(memberCounter, teamMembers);
+        List<AvailableScheduleDto> availableScheduleDtoList = new ArrayList<>();
+        for(int i=0; i< calendar.size(); i++){
+            List<Set<Member>> day = calendar.get(i);
+            for(int blockIndex=0; blockIndex<day.size(); blockIndex++){
+                Set<Member> oneBlock = day.get(blockIndex);
+                setCounter(memberCounter, oneBlock, requiredBlockNum);
+
+                Set<Member> availableMems = new HashSet<>();
+                for(Member member : memberCounter.keySet()){
+                    if(memberCounter.get(member) == requiredBlockNum) availableMems.add(member);
+                }
+
+                if(maxNum < availableMems.size()){
+                    maxNum = availableMems.size();
+                    availableScheduleDtoList.clear();
+                    String start = convertBlockToTime(blockIndex-requiredBlockNum+1, hourDividedBy);
+                    String end = convertBlockToTime(blockIndex, hourDividedBy);
+                    insertAvailableSchedule(availableScheduleDtoList, availableMems, start, end, convertToWeekday(i));
+
+                }else if(maxNum == availableMems.size()){
+                    String start = convertBlockToTime(blockIndex-requiredBlockNum+1, hourDividedBy);
+                    String end = convertBlockToTime(blockIndex+1, hourDividedBy);
+                    insertAvailableSchedule(availableScheduleDtoList, availableMems, start, end, convertToWeekday(i));
+                }
+            }
+        }
+        return availableScheduleDtoList;
+    }
+
+    private String convertBlockToTime(Integer blockIndex, Integer hourDividedBy) {
+        int hour = blockIndex / hourDividedBy;
+        int minute = (blockIndex % hourDividedBy) * (60/hourDividedBy);
+
+        String time = String.format("%02d",hour)+":"+String.format("%02d",minute);
+        return time;
+    }
+
+    private void setCounter(Map<Member, Integer> memberCounter, Set<Member> oneBlock, Integer requiredBlockNum) {
+        for(Member mem : memberCounter.keySet()){
+            if(oneBlock.contains(mem)) memberCounter.put(mem, 0);
+            else {
+                Integer continuousCount = memberCounter.get(mem) == requiredBlockNum ?
+                        memberCounter.get(mem) : memberCounter.get(mem)+1;
+                memberCounter.put(mem, continuousCount);
+            }
+        }
+    }
+
+    private void insertAvailableSchedule(List<AvailableScheduleDto> availableScheduleDtoList,
+                                         Set<Member> availableMems,
+                                         String start,
+                                         String end,
+                                         String weekday) {
+        List<Member> templist = new ArrayList<>();
+        for(Member mem : availableMems){
+            templist.add(mem);
+        }
+        AvailableScheduleDto dto = AvailableScheduleDto.builder()
+                .availableMember(templist)
+                .start(weekday+"+"+start)
+                .end(weekday+"+"+end)
+                .build();
+        availableScheduleDtoList.add(dto);
+    }
+
+    private void initializeCounter(Map<Member, Integer> memberCounter, List<Member> teamMembers) {
+        for(Member member : teamMembers){
+            memberCounter.put(member, 0);
+        }
+    }
+}
diff --git a/src/main/java/com/coderder/colorMeeting/service/ScheduleService.java b/src/main/java/com/coderder/colorMeeting/service/ScheduleService.java
index d1269ef..cf8497d 100644
--- a/src/main/java/com/coderder/colorMeeting/service/ScheduleService.java
+++ b/src/main/java/com/coderder/colorMeeting/service/ScheduleService.java
@@ -3,10 +3,7 @@
 import com.coderder.colorMeeting.dto.request.ScheduleRequestDto;
 import com.coderder.colorMeeting.dto.request.TeamScheduleRequestDto;
 import com.coderder.colorMeeting.dto.request.TeamTimeDto;
-import com.coderder.colorMeeting.dto.response.PersonalScheduleDto;
-import com.coderder.colorMeeting.dto.response.PersonalScheduleListDto;
-import com.coderder.colorMeeting.dto.response.ScheduleBlockDto;
-import com.coderder.colorMeeting.dto.response.TeamScheduleDto;
+import com.coderder.colorMeeting.dto.response.*;
 import com.coderder.colorMeeting.model.Member;
 
 import java.util.List;
@@ -19,7 +16,6 @@ public interface ScheduleService {
 
     List<ScheduleBlockDto> getBlockListByTeamIdWithoutOverlap(Long teamId);
 
-    List<ScheduleBlockDto> getTeamEmptyTimes(TeamTimeDto teamTimeDto);
 
     void insertGroupSchedule(TeamScheduleRequestDto teamScheduleDto);
 
@@ -35,4 +31,6 @@ public interface ScheduleService {
     void updateGroupSchedule(TeamScheduleRequestDto teamScheduleDto);
 
     void deleteGroupSchedule(Long scheduleId);
+
+    RandomRecommendationDto getRandomRecommandation(Long teamId, Integer spanTime);
 }
diff --git a/src/main/java/com/coderder/colorMeeting/service/ScheduleServiceImpl.java b/src/main/java/com/coderder/colorMeeting/service/ScheduleServiceImpl.java
index 1b48614..e0651e6 100644
--- a/src/main/java/com/coderder/colorMeeting/service/ScheduleServiceImpl.java
+++ b/src/main/java/com/coderder/colorMeeting/service/ScheduleServiceImpl.java
@@ -4,6 +4,7 @@
 import com.coderder.colorMeeting.dto.request.TeamScheduleRequestDto;
 import com.coderder.colorMeeting.dto.request.TeamTimeDto;
 import com.coderder.colorMeeting.dto.response.*;
+import com.coderder.colorMeeting.etc.ScheduleCalendar;
 import com.coderder.colorMeeting.exception.ErrorCode;
 import com.coderder.colorMeeting.exception.NotFoundException;
 import com.coderder.colorMeeting.model.Member;
@@ -16,10 +17,8 @@
 
 import java.time.LocalTime;
 import java.time.format.DateTimeFormatter;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
+import java.util.stream.Collectors;
 
 @Service
 public class ScheduleServiceImpl implements ScheduleService{
@@ -123,7 +122,6 @@ private List<ScheduleBlockDto> calendarToScheduleDto(boolean[][] calendar) {
         return scheduleBlockDtoList;
     }
 
-    @Override
     public List<ScheduleBlockDto> getTeamEmptyTimes(TeamTimeDto teamTimeDto) {
         List<Member> members = memberRepository.findAllWithTeamId(teamTimeDto.getTeamId());
         List<PersonalSchedule> teamSchedules = personalScheduleRepository.findAllByMemberIn(members);
@@ -325,4 +323,39 @@ public void updateGroupSchedule(TeamScheduleRequestDto teamScheduleDto) {
     public void deleteGroupSchedule(Long scheduleId) {
         teamScheduleRepository.deleteById(scheduleId);
     }
+
+    @Override
+    public RandomRecommendationDto getRandomRecommandation(Long teamId, Integer spanTime) {
+        List<AvailableScheduleDto> teamEmptyTimes = getMaxAvailableList(teamId, spanTime);
+
+        Random random = new Random();
+        AvailableScheduleDto randomSchedule = teamEmptyTimes.get(random.nextInt(teamEmptyTimes.size()));
+
+        List<String> availableMembers = randomSchedule.getAvailableMember()
+                .stream()
+                .map(Member::getNickname)
+                .collect(Collectors.toList());
+
+        RandomRecommendationDto randomRecommendationDto = RandomRecommendationDto.builder()
+                .start(randomSchedule.getStart())
+                .end(randomSchedule.getEnd())
+                .memberNickNames(availableMembers)
+                .build();
+
+        return randomRecommendationDto;
+    }
+
+    private List<AvailableScheduleDto> getMaxAvailableList(Long teamId, Integer spanTime) {
+        List<Member> members = memberRepository.findAllWithTeamId(teamId);
+        List<PersonalSchedule> teamSchedules = personalScheduleRepository.findAllByMemberIn(members);
+
+        List<AvailableScheduleDto> recommendationDtos = getMostEmptyTime(teamSchedules, members, spanTime, 2);
+        return recommendationDtos;
+    }
+
+    private List<AvailableScheduleDto> getMostEmptyTime(List<PersonalSchedule> teamSchedules, List<Member> members, Integer spanTime, int hourDividedBy) {
+        ScheduleCalendar calendar = ScheduleCalendar.createCalendar(teamSchedules, members, hourDividedBy);
+        List<AvailableScheduleDto> mostAvailableList = calendar.getMostAvailableList(spanTime, hourDividedBy);
+        return mostAvailableList;
+    }
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 8f8d0ec..045f93a 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -2,7 +2,7 @@
 spring.profiles.include=db-username,db-url,db-password,secret
 
 # DB ddl
-spring.jpa.hibernate.ddl-auto=update
+spring.jpa.hibernate.ddl-auto=none
 
 # SQL DB
 spring.jpa.properties.hibernate.format_sql=true