diff --git a/SPMS.Infrastructure/DependencyInjection.cs b/SPMS.Infrastructure/DependencyInjection.cs
index 0eee960..9d68f22 100644
--- a/SPMS.Infrastructure/DependencyInjection.cs
+++ b/SPMS.Infrastructure/DependencyInjection.cs
@@ -12,6 +12,7 @@ using SPMS.Infrastructure.Push;
 using SPMS.Infrastructure.Persistence.Repositories;
 using SPMS.Infrastructure.Security;
 using SPMS.Infrastructure.Services;
+using SPMS.Infrastructure.Workers;
 
 namespace SPMS.Infrastructure;
 
@@ -67,6 +68,9 @@ public static class DependencyInjection
             });
         services.AddSingleton<IApnsSender, ApnsSender>();
 
+        // Workers
+        services.AddHostedService<PushWorker>();
+
         // Token Store & Email Service
         services.AddMemoryCache();
         services.AddSingleton<ITokenStore, InMemoryTokenStore>();
diff --git a/SPMS.Infrastructure/Workers/PushWorker.cs b/SPMS.Infrastructure/Workers/PushWorker.cs
new file mode 100644
index 0000000..db47dc5
--- /dev/null
+++ b/SPMS.Infrastructure/Workers/PushWorker.cs
@@ -0,0 +1,390 @@
+using System.Text;
+using System.Text.Json;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using RabbitMQ.Client;
+using RabbitMQ.Client.Events;
+using SPMS.Application.DTOs.Push;
+using SPMS.Application.Interfaces;
+using SPMS.Application.Settings;
+using SPMS.Domain.Entities;
+using SPMS.Domain.Enums;
+using SPMS.Domain.Interfaces;
+using SPMS.Infrastructure.Messaging;
+
+namespace SPMS.Infrastructure.Workers;
+
+public class PushWorker : BackgroundService
+{
+    private const int MaxRetryCount = 3;
+
+    private readonly RabbitMQConnection _rabbitConnection;
+    private readonly RabbitMQSettings _rabbitSettings;
+    private readonly IServiceScopeFactory _scopeFactory;
+    private readonly IDuplicateChecker _duplicateChecker;
+    private readonly IFcmSender _fcmSender;
+    private readonly IApnsSender _apnsSender;
+    private readonly ILogger<PushWorker> _logger;
+
+    public PushWorker(
+        RabbitMQConnection rabbitConnection,
+        IOptions<RabbitMQSettings> rabbitSettings,
+        IServiceScopeFactory scopeFactory,
+        IDuplicateChecker duplicateChecker,
+        IFcmSender fcmSender,
+        IApnsSender apnsSender,
+        ILogger<PushWorker> logger)
+    {
+        _rabbitConnection = rabbitConnection;
+        _rabbitSettings = rabbitSettings.Value;
+        _scopeFactory = scopeFactory;
+        _duplicateChecker = duplicateChecker;
+        _fcmSender = fcmSender;
+        _apnsSender = apnsSender;
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        _logger.LogInformation("PushWorker 시작");
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                await ConsumeAsync(stoppingToken);
+            }
+            catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+            {
+                break;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "PushWorker 오류 — 5초 후 재시도");
+                await Task.Delay(TimeSpan.FromSeconds(5), stoppingToken);
+            }
+        }
+
+        _logger.LogInformation("PushWorker 종료");
+    }
+
+    private async Task ConsumeAsync(CancellationToken stoppingToken)
+    {
+        await using var channel = await _rabbitConnection.CreateChannelAsync(stoppingToken);
+        await channel.BasicQosAsync(0, _rabbitSettings.PrefetchCount, false, stoppingToken);
+
+        var tcs = new TaskCompletionSource();
+        stoppingToken.Register(() => tcs.TrySetResult());
+
+        var consumer = new AsyncEventingBasicConsumer(channel);
+        consumer.ReceivedAsync += async (_, ea) =>
+        {
+            try
+            {
+                await ProcessMessageAsync(channel, ea, stoppingToken);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "메시지 처리 중 예외 발생");
+                await HandleRetryAsync(channel, ea, stoppingToken);
+            }
+        };
+
+        await channel.BasicConsumeAsync(
+            queue: _rabbitSettings.PushQueue,
+            autoAck: false,
+            consumer: consumer,
+            cancellationToken: stoppingToken);
+
+        _logger.LogInformation("PushWorker Consumer 등록 완료: queue={Queue}", _rabbitSettings.PushQueue);
+
+        await tcs.Task;
+    }
+
+    private async Task ProcessMessageAsync(IChannel channel, BasicDeliverEventArgs ea, CancellationToken ct)
+    {
+        var body = Encoding.UTF8.GetString(ea.Body.ToArray());
+        var pushMessage = JsonSerializer.Deserialize<PushMessageDto>(body);
+
+        if (pushMessage == null)
+        {
+            _logger.LogWarning("메시지 역직렬화 실패 — ACK 후 스킵");
+            await channel.BasicAckAsync(ea.DeliveryTag, false, ct);
+            return;
+        }
+
+        // [1] Redis 중복 체크
+        if (await _duplicateChecker.IsDuplicateAsync(pushMessage.RequestId, ct))
+        {
+            _logger.LogInformation("중복 메시지 스킵: requestId={RequestId}", pushMessage.RequestId);
+            await channel.BasicAckAsync(ea.DeliveryTag, false, ct);
+            return;
+        }
+
+        using var scope = _scopeFactory.CreateScope();
+        var serviceRepo = scope.ServiceProvider.GetRequiredService<IServiceRepository>();
+        var deviceRepo = scope.ServiceProvider.GetRequiredService<IDeviceRepository>();
+        var unitOfWork = scope.ServiceProvider.GetRequiredService<IUnitOfWork>();
+
+        // 서비스 조회
+        var service = await serviceRepo.GetByIdAsync(pushMessage.ServiceId);
+        if (service == null)
+        {
+            _logger.LogWarning("서비스 없음: serviceId={ServiceId}", pushMessage.ServiceId);
+            await channel.BasicAckAsync(ea.DeliveryTag, false, ct);
+            return;
+        }
+
+        // [2] send_type별 대상 Device 조회
+        var devices = await ResolveDevicesAsync(deviceRepo, pushMessage, ct);
+        if (devices.Count == 0)
+        {
+            _logger.LogInformation("발송 대상 없음: requestId={RequestId}", pushMessage.RequestId);
+            await channel.BasicAckAsync(ea.DeliveryTag, false, ct);
+            return;
+        }
+
+        // [3] 플랫폼별 분류
+        var iosDevices = devices.Where(d => d.Platform == Platform.iOS).ToList();
+        var androidDevices = devices.Where(d => d.Platform == Platform.Android).ToList();
+
+        var customData = pushMessage.CustomData?
+            .ToDictionary(kv => kv.Key, kv => kv.Value.ToString() ?? string.Empty);
+
+        if (!string.IsNullOrEmpty(pushMessage.LinkUrl))
+            (customData ??= new Dictionary<string, string>())["link_url"] = pushMessage.LinkUrl;
+
+        // [4] 배치 발송
+        var allResults = new List<(Device Device, PushResultDto Result)>();
+
+        if (androidDevices.Count > 0 && !string.IsNullOrEmpty(service.FcmCredentials))
+        {
+            var fcmResults = await SendFcmBatchAsync(
+                service.FcmCredentials, androidDevices, pushMessage, customData, ct);
+            allResults.AddRange(fcmResults);
+        }
+
+        if (iosDevices.Count > 0 &&
+            !string.IsNullOrEmpty(service.ApnsPrivateKey) &&
+            !string.IsNullOrEmpty(service.ApnsKeyId) &&
+            !string.IsNullOrEmpty(service.ApnsTeamId) &&
+            !string.IsNullOrEmpty(service.ApnsBundleId))
+        {
+            var apnsResults = await SendApnsBatchAsync(
+                service, iosDevices, pushMessage, customData, ct);
+            allResults.AddRange(apnsResults);
+        }
+
+        // [5] 결과 처리: PushSendLog INSERT + Device 상태 변경
+        var pushSendLogRepo = scope.ServiceProvider.GetRequiredService<IRepository<PushSendLog>>();
+        var dailyStatRepo = scope.ServiceProvider.GetRequiredService<IRepository<DailyStat>>();
+
+        int successCount = 0, failCount = 0;
+
+        foreach (var (device, result) in allResults)
+        {
+            var log = new PushSendLog
+            {
+                ServiceId = pushMessage.ServiceId,
+                MessageId = long.TryParse(pushMessage.MessageId, out var mid) ? mid : 0,
+                DeviceId = device.Id,
+                Status = result.IsSuccess ? PushResult.Success : PushResult.Failed,
+                FailReason = result.ErrorMessage,
+                SentAt = DateTime.UtcNow
+            };
+            await pushSendLogRepo.AddAsync(log);
+
+            if (result.IsSuccess)
+                successCount++;
+            else
+                failCount++;
+
+            // 영구 오류: 디바이스 비활성화
+            if (result.ShouldRemoveDevice)
+            {
+                device.IsActive = false;
+                device.UpdatedAt = DateTime.UtcNow;
+                deviceRepo.Update(device);
+            }
+        }
+
+        // [6] DailyStat 증분 업데이트
+        var today = DateOnly.FromDateTime(DateTime.UtcNow);
+        var stats = await dailyStatRepo.FindAsync(
+            s => s.ServiceId == pushMessage.ServiceId && s.StatDate == today);
+        var stat = stats.FirstOrDefault();
+
+        if (stat != null)
+        {
+            stat.SentCnt += allResults.Count;
+            stat.SuccessCnt += successCount;
+            stat.FailCnt += failCount;
+            dailyStatRepo.Update(stat);
+        }
+        else
+        {
+            await dailyStatRepo.AddAsync(new DailyStat
+            {
+                ServiceId = pushMessage.ServiceId,
+                StatDate = today,
+                SentCnt = allResults.Count,
+                SuccessCnt = successCount,
+                FailCnt = failCount,
+                CreatedAt = DateTime.UtcNow
+            });
+        }
+
+        await unitOfWork.SaveChangesAsync(ct);
+
+        _logger.LogInformation(
+            "푸시 발송 완료: requestId={RequestId}, 성공={Success}, 실패={Fail}, 총={Total}",
+            pushMessage.RequestId, successCount, failCount, allResults.Count);
+
+        // [8] ACK
+        await channel.BasicAckAsync(ea.DeliveryTag, false, ct);
+    }
+
+    private async Task<List<Device>> ResolveDevicesAsync(
+        IDeviceRepository deviceRepo, PushMessageDto message, CancellationToken ct)
+    {
+        var sendType = message.SendType.ToLowerInvariant();
+
+        switch (sendType)
+        {
+            case "single":
+            {
+                var deviceIds = ParseDeviceIds(message.Target);
+                if (deviceIds.Count == 0) return [];
+
+                var devices = new List<Device>();
+                foreach (var id in deviceIds)
+                {
+                    var device = await deviceRepo.GetByIdAndServiceAsync(id, message.ServiceId);
+                    if (device is { IsActive: true, PushAgreed: true })
+                        devices.Add(device);
+                }
+                return devices;
+            }
+
+            case "group":
+            {
+                var tags = ParseTags(message.Target);
+                if (tags.Count == 0) return [];
+
+                var allDevices = await deviceRepo.FindAsync(
+                    d => d.ServiceId == message.ServiceId && d.IsActive && d.PushAgreed);
+
+                return allDevices
+                    .Where(d => !string.IsNullOrEmpty(d.Tags) &&
+                                tags.Any(tag => d.Tags.Contains(tag)))
+                    .ToList();
+            }
+
+            case "broadcast":
+            {
+                var allDevices = await deviceRepo.FindAsync(
+                    d => d.ServiceId == message.ServiceId && d.IsActive && d.PushAgreed);
+                return allDevices.ToList();
+            }
+
+            default:
+                _logger.LogWarning("지원하지 않는 send_type: {SendType}", sendType);
+                return [];
+        }
+    }
+
+    private static List<long> ParseDeviceIds(PushTargetDto target)
+    {
+        if (target.Value == null) return [];
+
+        try
+        {
+            if (target.Value.Value.ValueKind == JsonValueKind.Array)
+            {
+                return target.Value.Value.EnumerateArray()
+                    .Where(e => e.ValueKind == JsonValueKind.Number)
+                    .Select(e => e.GetInt64())
+                    .ToList();
+            }
+        }
+        catch { }
+
+        return [];
+    }
+
+    private static List<string> ParseTags(PushTargetDto target)
+    {
+        if (target.Value == null) return [];
+
+        try
+        {
+            if (target.Value.Value.ValueKind == JsonValueKind.Array)
+            {
+                return target.Value.Value.EnumerateArray()
+                    .Where(e => e.ValueKind == JsonValueKind.String)
+                    .Select(e => e.GetString()!)
+                    .ToList();
+            }
+        }
+        catch { }
+
+        return [];
+    }
+
+    private async Task<List<(Device Device, PushResultDto Result)>> SendFcmBatchAsync(
+        string fcmCredentials, List<Device> devices, PushMessageDto message,
+        Dictionary<string, string>? customData, CancellationToken ct)
+    {
+        var results = new List<(Device, PushResultDto)>();
+        var tokens = devices.Select(d => d.DeviceToken).ToList();
+
+        var batchResults = await _fcmSender.SendBatchAsync(
+            fcmCredentials, tokens, message.Title, message.Body,
+            message.ImageUrl, customData, ct);
+
+        for (int i = 0; i < batchResults.Count && i < devices.Count; i++)
+            results.Add((devices[i], batchResults[i]));
+
+        return results;
+    }
+
+    private async Task<List<(Device Device, PushResultDto Result)>> SendApnsBatchAsync(
+        Service service, List<Device> devices, PushMessageDto message,
+        Dictionary<string, string>? customData, CancellationToken ct)
+    {
+        var results = new List<(Device, PushResultDto)>();
+        var tokens = devices.Select(d => d.DeviceToken).ToList();
+
+        var batchResults = await _apnsSender.SendBatchAsync(
+            service.ApnsPrivateKey!, service.ApnsKeyId!, service.ApnsTeamId!, service.ApnsBundleId!,
+            tokens, message.Title, message.Body,
+            message.ImageUrl, customData, ct);
+
+        for (int i = 0; i < batchResults.Count && i < devices.Count; i++)
+            results.Add((devices[i], batchResults[i]));
+
+        return results;
+    }
+
+    private async Task HandleRetryAsync(IChannel channel, BasicDeliverEventArgs ea, CancellationToken ct)
+    {
+        var retryCount = 0;
+        if (ea.BasicProperties.Headers?.TryGetValue("x-retry-count", out var retryObj) == true)
+        {
+            retryCount = retryObj is int r ? r : 0;
+        }
+
+        if (retryCount < MaxRetryCount)
+        {
+            _logger.LogWarning("메시지 재시도 ({RetryCount}/{MaxRetry})", retryCount + 1, MaxRetryCount);
+            await channel.BasicNackAsync(ea.DeliveryTag, false, true, ct);
+        }
+        else
+        {
+            _logger.LogError("메시지 최대 재시도 초과 — 폐기: deliveryTag={Tag}", ea.DeliveryTag);
+            await channel.BasicNackAsync(ea.DeliveryTag, false, false, ct);
+        }
+    }
+}