1. We can distinguish the smoke state of the smoke stove. According to the smoke state, the smoke can be divided into wood smoking method and liquid smoking method. The liquid smoking method does not need a smoking device, and directly injects the smoke liquid into the smoke stove.

2. According to the way of smoking, we can divide it into indirect smoking and direct smoking. Direct smoking is a more traditional way, and the application practice is also relatively long. The indirect smoking chamber is completely separated from the smoking chamber. 

3. We can also distinguish smoking methods according to temperature: cold, hot and warm.