By using Mark watermark camera to take photos and add watermarks, managers can monitor the work of service personnel in real time to ensure that the work is completed on time and in quantity. You can also record the working status of service personnel, including cleaning, preparing meals, service attitude and so on. , to help managers understand the details of the work. By recording the service situation and adding watermark, the service quality can be evaluated and improved, thus improving customer satisfaction. Recording working conditions can reduce disputes between management and employees and improve work efficiency and teamwork.