Drinking water cannot be eaten as a meal. The analysis is as follows:

1. First of all, eating can provide energy necessary for human life activities, while drinking water can hardly provide energy for human body.

2. Eating can provide the human body with three essential productive substances: sugar, fat and protein, while water does not contain these three productive substances.

3. Water can't provide the vitamin requirement for human body to maintain normal life.

4. The mineral content in water can't fully meet the needs of human body.

In addition, drinking too much water may also cause water poisoning.

For the above reasons, drinking water should not be eaten as a meal.