Based on meteorological and heating data inside and outside for heating period in 2001—2002,a calculation method of energy efficiency temperature in different meteorological conditions, such as surrounding temperature, wind speed, radiation and so on, is obtained. The heating meteorological index and its dividing standard are given for the first time. Then total heating load,water temperature difference of in to out, even water-in temperature by controlling water-out temperature can be calculated that are put into practice in the meteorological and district heating department, it will be helpful for heating dispatching and become the basis of energy efficiency, benefit augmentation and pollution alleviation.