diff --git a/app/Models/WaterQualityMonitoringDailyLog.php b/app/Models/WaterQualityMonitoringDailyLog.php
new file mode 100644
index 0000000..493361f
--- /dev/null
+++ b/app/Models/WaterQualityMonitoringDailyLog.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class WaterQualityMonitoringDailyLog extends Model
+{
+    use HasFactory;
+
+    protected $casts = [
+        'monitored_at' => 'datetime',
+    ];
+
+    protected $fillable = [
+        'device_id',
+        'agricultural_base_id',
+        'chlorine',
+        'conductivity',
+        'oxygen',
+        'ph',
+        'temperature',
+        'turbidity',
+        'monitored_at',
+    ];
+}
diff --git a/app/Services/LinkosDeviceLogService.php b/app/Services/LinkosDeviceLogService.php
index f639efc..6583055 100644
--- a/app/Services/LinkosDeviceLogService.php
+++ b/app/Services/LinkosDeviceLogService.php
@@ -8,6 +8,7 @@ use App\Models\Device;
 use App\Models\LinkosDeviceLog;
 use App\Models\MeteorologicalMonitoringLog;
 use App\Models\SoilMonitoringLog;
+use App\Models\WaterQualityMonitoringDailyLog;
 use App\Models\WaterQualityMonitoringLog;
 use Carbon\Carbon;
 use Illuminate\Support\Arr;
@@ -95,11 +96,18 @@ class LinkosDeviceLogService
 
         if ($log->data) {
             foreach ($devices as $device) {
-                match ($device->type) {
-                    DeviceType::Soil => $this->handleSoilDeviceData($device, $log->data, $log->reported_at),
-                    DeviceType::Meteorological => $this->handleMeteorologicalDeviceData($device, $log->data, $log->reported_at),
-                    DeviceType::WaterQuality => $this->handleWaterQualityDeviceData($device, $log->data, $log->reported_at),
-                };
+                switch ($device->type) {
+                    case DeviceType::Soil:
+                        break;
+
+                    case DeviceType::Meteorological:
+                        break;
+
+                    case DeviceType::WaterQuality:
+                        $this->handleWaterQualityMonitoringLog($device, $log->data, $log->reported_at);
+                        $this->handleWaterQualityMonitoringDailyLog($device, $log->reported_at);
+                        break;
+                }
             }
         }
 
@@ -171,14 +179,14 @@ class LinkosDeviceLogService
     }
 
     /**
-     * 处理水质设备数据
+     * 按小时处理水质监测数据
      *
      * @param  \App\Models\Device  $device
      * @param  array  $data
-     * @param  \Carbon\Carbon  $reportedAt
+     * @param  \Carbon\Carbon  $monitoredAt
      * @return void
      */
-    public function handleWaterQualityDeviceData(Device $device, array $data, Carbon $reportedAt): void
+    public function handleWaterQualityMonitoringLog(Device $device, array $data, Carbon $monitoredAt): void
     {
         if (! Arr::hasAny($data, $this->waterQualityMonitoringFields)) {
             return;
@@ -186,7 +194,7 @@ class LinkosDeviceLogService
 
         $log = WaterQualityMonitoringLog::firstOrCreate([
             'device_id' => $device->id,
-            'monitored_at' => $reportedAt->startOfHour(),
+            'monitored_at' => $monitoredAt->startOfHour(),
         ], [
             'agricultural_base_id' => $device->agricultural_base_id,
         ]);
@@ -201,4 +209,53 @@ class LinkosDeviceLogService
 
         $log->save();
     }
+
+    /**
+     * 按天处理水质监测数据
+     *
+     * @param  \App\Models\Device  $device
+     * @param  \Carbon\Carbon  $date
+     * @return void
+     */
+    public function handleWaterQualityMonitoringDailyLog(Device $device, Carbon $date)
+    {
+        $logs = WaterQualityMonitoringLog::query()
+            ->where('device_id', $device->id)
+            ->whereBetween('monitored_at', [$date->copy()->startOfDay(), $date->copy()->endOfDay()])
+            ->oldest('monitored_at')
+            ->get();
+
+        if ($logs->isEmpty()) {
+            return;
+        }
+
+        $data = [];
+
+        foreach ($logs as $log) {
+            foreach (['chlorine', 'conductivity', 'oxygen', 'ph', 'temperature', 'turbidity'] as $key) {
+                if (! is_null($v = $log->{$key})) {
+                    continue;
+                }
+
+                $item = $data[$key] ?? ['sum' => 0, 'count' => 0];
+                $item['sum'] = bcadd($item['sum'], $v, 2);
+                $item['count']++;
+
+                $data[$key] = $item;
+            }
+        }
+
+        $dailyLog = WaterQualityMonitoringDailyLog::firstOrCreate([
+            'device_id' => $device->id,
+            'monitored_at' => $date,
+        ], [
+            'agricultural_base_id' => $device->agricultural_base_id,
+        ]);
+
+        foreach ($data as $key => $item) {
+            $dailyLog->{$key} = round(bcmul($item['sum'], $item['count'], 2), 2);
+        }
+
+        $dailyLog->save();
+    }
 }
diff --git a/database/migrations/2022_10_21_151702_create_water_quality_monitoring_daily_logs_table.php b/database/migrations/2022_10_21_151702_create_water_quality_monitoring_daily_logs_table.php
new file mode 100644
index 0000000..6882ab2
--- /dev/null
+++ b/database/migrations/2022_10_21_151702_create_water_quality_monitoring_daily_logs_table.php
@@ -0,0 +1,43 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('water_quality_monitoring_daily_logs', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('device_id')->comment('设备ID');
+            $table->unsignedBigInteger('agricultural_base_id')->comment('农业基地ID');
+            $table->decimal('chlorine', 8, 2)->nullable()->comment('余氯 (单位: mg/L)');
+            $table->decimal('conductivity', 8, 2)->nullable()->comment('电导率 (单位: us/cm)');
+            $table->decimal('oxygen', 8, 2)->nullable()->comment('溶解氧 (单位: mg/L)');
+            $table->decimal('ph', 8, 2)->nullable()->comment('PH');
+            $table->decimal('temperature', 8, 2)->nullable()->comment('温度 (单位: ℃)');
+            $table->decimal('turbidity', 8, 2)->nullable()->comment('浊度 (单位: NTU)');
+            $table->date('monitored_at')->comment('监控时间(小时)');
+            $table->timestamps();
+
+            $table->index('agricultural_base_id');
+            $table->unique(['device_id', 'monitored_at']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('water_quality_monitoring_daily_logs');
+    }
+};