diff --git a/app/Models/Device.php b/app/Models/Device.php
index aa5f9fe..81706f8 100644
--- a/app/Models/Device.php
+++ b/app/Models/Device.php
@@ -5,6 +5,7 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use EloquentFilter\Filterable;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
 class Device extends Model
 {
@@ -16,6 +17,10 @@ class Device extends Model
     public const TYPE_WATER_QUALITY = 3;    //水质设备
     public const TYPE_METEOROLOGICAL = 4;   //气象设备
 
+    public const STATE_DISABLED = 0;
+    public const STATE_ONLINE = 1;
+    public const STATE_OFFLINE = 2;
+    public const STATE_FAULT = 3;
 
     protected $fillable = [
         'name', 'sn', 'powered_by', 'type', 'model_sn', 'state', 'extends',
@@ -26,6 +31,11 @@ class Device extends Model
         return $date->format('Y-m-d H:i:s');
     }
 
+    public function logs(): HasMany
+    {
+        return $this->hasMany(DeviceLog::class);
+    }
+
     public static function typeMap()
     {
         return [
diff --git a/app/Models/DeviceLog.php b/app/Models/DeviceLog.php
new file mode 100644
index 0000000..fe2bfd6
--- /dev/null
+++ b/app/Models/DeviceLog.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class DeviceLog extends Model
+{
+    use HasFactory;
+
+    protected $casts = [
+        'data' => 'json',
+        'reported_at' => 'datetime',
+    ];
+}
diff --git a/database/migrations/2023_04_28_113344_create_device_logs_table.php b/database/migrations/2023_04_28_113344_create_device_logs_table.php
new file mode 100644
index 0000000..fd9332c
--- /dev/null
+++ b/database/migrations/2023_04_28_113344_create_device_logs_table.php
@@ -0,0 +1,37 @@
+<?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('device_logs', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('device_id');
+            $table->json('data')->nullable();
+            $table->timestamp('reported_at');
+            $table->timestamps();
+
+            $table->index(['device_id', 'reported_at']);
+            $table->index('reported_at');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('device_logs');
+    }
+};