1. Keep the boiler evaporation capacity within the rated value, and satisfy the requirement of the unit load.
2. Keep the normal steam pressure, steam temperature, bed temperature and bed pressure.
3. Uniform water supply, to maintain the normal water level.
4. Ensure that the boiler water and steam quality qualified.
5. Maintain good combustion, reducing heat loss, improve the thermal efficiency of boiler.
6. Adjust the boiler operation condition, as far as possible to maintain the operation parameters on the best condition to run.  (lsh)