With the developing of the industry

the application of the catorimeter is broader and broader in the energy sources production and the energy expend corporation.So how to increase the measurement precision of the catorimeter possibly always is the concerned problem.A method of the design of catorimeter based on SCM C8051F350 is introduced.The method also uses the platinum resistance Pt1000 whose precision is very high as the temperature sensor.And that makes the precision of measurement higher.The design not only is satisfied with GB but also has great improvemen on the precision of measurement and the stability of the whole system concerned through the analysis of experimental data.