A self-service food ordering machine is a modern food service device usually used in places such as restaurants, fast food stores or cafes. It allows customers to select and order food on their own through a touch screen or other input methods, reducing the interaction with waiters.

Below are some of the key features and functions of a self-service food ordering machine:

1. **User Interface**: It is usually equipped with a touch screen that allows customers to select food and beverages by clicking on items on the menu. Some advanced machines also support voice recognition or QR code scanning.

2. **Menu Display**: a clear display of all dishes, drinks and additional options available at the restaurant, including prices, pictures and descriptions. Customers can browse and select their favorite items.

3. **Personalization**: Customers can customize their dishes according to their personal preferences, such as choosing toppings, seasonings or cooking methods.

4. **Real-time update**: Menu content can be updated in real-time, including price changes, inventory status and promotions.

5. **Payment Function**: With the integrated payment system, customers can complete the transaction by swiping card, cell phone payment or cash payment. Some machines also support e-invoice or points redemption.

6. **Order Confirmation**: After completing the ordering process, the system usually generates an order number, which the customer can use to track the order status or present it when picking up the food.

7. **Print Voucher**: Provide an order voucher, which usually includes order details and payment information. The voucher may be printed out in paper form or sent to the customer via email or SMS.

8. **No-touch experience**: reduces direct contact with staff, in line with modern hygiene and convenience needs.

The key benefits of self-ordering kiosks include increased efficiency, reduced queuing times, lower labor costs, and greater freedom of choice and convenience for customers.