我要点菜。

You use this when the waiter is nearby. You can raise your hand slightly to get attention. Say it clearly and with a smile. It is often preceded by calling the waiter 服务员 (fúwùyuán). This makes the interaction smooth and polite. You do not need complex grammar here. Just the phrase is enough to start the process.

Use it at any standard sit-down restaurant. Use it when you have finished looking at the menu. It works perfectly in casual diners or mid-range spots. If you are with friends, you can say it to the group. It lets them know it is time to stop talking and start choosing. It is also great for busy lunch breaks when time is short.

Do not use this at a fast-food counter with a line. There, you just start saying what you want. Avoid using it in very high-end, fine-dining establishments. In those places, the waiter usually anticipates your needs. Using 'I want' might feel a bit too demanding there. Also, do not say it if the waiter is already holding a pen and looking at you. That is just redundant and a little awkward.

In China, dining is a loud, social, and vibrant event. You often have to be proactive to get service in busy spots. Calling out for the waiter is not considered rude. It is actually expected in many local 're'nao' (bustling) restaurants. The phrase reflects a culture where food is the central focus of the gathering. Ordering is the official 'kick-off' of the social event.

You can soften it by adding 想 (xiǎng) instead of 要 (yào). This changes it to 'I would like to order.' You can also just say 点菜 (diǎn cài) if the waiter is already at the table. If you are in a rush, you might say 可以点菜了吗? (Kěyǐ diǎncài le ma?). This asks 'Can we order now?' which is slightly more polite.