1, cooked raw materials can make the main, auxiliary and seasoning qualitatively change after cooking and heating;

2, promote the decomposition of nutrients, is conducive to digestion, all food raw materials contain certain nutrients, nutrients in food, nutrients in food must be decomposed to facilitate human absorption, cooking can promote the decomposition of nutrients in food raw materials;

3, adjust the color, increase the aesthetic feeling. Cooking can make the color of raw materials more beautiful and provide a meal with good color, shape and taste;

4. Blend tastes and promote appetite. Raw raw materials each have a special taste, and cooking replaces this special taste with delicious food;

5. Juice mixing enriches dishes. When food raw materials are heated, some water overflows and evaporates, making the main and auxiliary materials unsaturated;

6. Provide nutritious meals to enhance people's physique and meet the material needs of human diet;

7. Provide healthy and safe meals to ensure food hygiene;

8. Create and develop food culture and promote the construction of human civilization.