1, the temperature control is more uniform: water stew using a double boiler stewing method, the use of water vapor to transfer heat, so that the ingredients are more uniformly heated, avoiding direct contact with the fire source of the local high temperature, to maintain the nutrition and taste of the food.

2. Prevent burnt overflow: During the stewing process, the water in the water pot can play a buffering role, preventing burnt overflow from the pot, avoiding the occurrence of burnt paste, and ensuring the integrity of the food's texture and appearance.