The differences between microwave oven and air fryer are as follows:

1. The heating principle is different. The air fryer uses high-speed air circulation system for heating, while the microwave oven uses magnetron for heating.

2. Different functions, microwave oven is microwave heating, which starts from the inside of food, such as heating steamed bread. Microwave oven can dry steamed bread, but it can't make the skin of steamed bread brittle. Air fryer is similar to oven, which can make the skin brittle. If heated at high temperature for a short time, it can lead to external heating and internal cooling, while microwave oven is internal heating and external cooling.

3. The nature is different. The air fryer is used to fry things, but it is raw before frying. You need to put your own ingredients away, or buy something that has been prepared in a supermarket. The microwave oven is used to heat food. Although it can cook raw food, it is impossible to cook fried things.