diff --git a/internal/app/service/device/device_service.go b/internal/app/service/device/device_service.go
new file mode 100644
index 0000000..4a7a45c
--- /dev/null
+++ b/internal/app/service/device/device_service.go
@@ -0,0 +1,42 @@
+package device
+
+import "git.huangwc.com/pig/pig-farm-controller/internal/infra/models"
+
+// 设备行为
+type DeviceAction string
+
+var (
+	DeviceActionStart = "start" // 启动
+	DeviceActionStop  = "stop"  // 停止
+)
+
+// 指令类型
+type Method string
+
+var (
+	MethodPing = "ping" // ping指令
+)
+
+// Service 抽象了一组方法用于控制设备行为
+type Service interface {
+
+	// Switch 用于切换指定设备的状态, 比如启动和停止
+	Switch(device models.Device, action DeviceAction) error
+
+	// Ping 用于检查设备是否正常
+	Ping() error
+}
+
+// 设备操作指令通用结构(最外层)
+type DeviceRequest struct {
+	MessageID int         // 消息ID, 用于后续匹配响应
+	Method    string      // 这是什么指令
+	Data      interface{} // 指令参数
+}
+
+// 设备操作指令通用响应结构(最外层)
+type DeviceResponse struct {
+	MessageID int // 消息ID, 用于匹配这是哪一个请求的响应
+	Message   string
+	Data      interface{} // 响应内容
+}
diff --git a/internal/app/service/device/general_device_service.go b/internal/app/service/device/general_device_service.go
new file mode 100644
index 0000000..b3caeed
--- /dev/null
+++ b/internal/app/service/device/general_device_service.go
@@ -0,0 +1,18 @@
+package device
+
+import (
+	"git.huangwc.com/pig/pig-farm-controller/internal/infra/models"
+)
+
+type GeneralDeviceService struct {
+}
+
+func (g *GeneralDeviceService) Switch(device models.Device, action DeviceAction) error {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (g *GeneralDeviceService) Ping() error {
+	//TODO implement me
+	panic("implement me")
+}