Heat meter is a kind of verification instrument, and its accurate directly relates to the  benefits of every personal and heating businesses.In our country,the metrological supervision and administration for the heat energy meter measuring instruments were strengthened ,and the first time verification of the heat energy meter installed  was strengthened before use, the construction of the heating system of measuring instruments, such as the thermal chart were speeded up, the measurement standards of the heat meter verification devices were actively worked out by measurement technology institutions at all levels, technical support for heat metering supervision was provided.  Methods and principles of measurement and evaluation of uncertainty were introduced.And in the verification process of heat energy table,not only flow, temperature and calculator,but also the amount of heat were needed to verificate.In the uncertainty evalution of value,each part was needed to be assessed separately.