Abstract： A dual heating and cooling method was proposed to precisely measure specific heat in this paper. The apparatus with no load and with the measured object was heated and cooled respectively. The temperature sequences during the four courses were processed to calculate the specific heat. The proposed method can eliminate the influence of heat dissipation on measurement and significantly improve the precision. A measurement experiment was conducted on a bit of water as specimen. The measurement error is less than 1% under normal heat dissipation condition, which validates the effectiveness of the method. The proposed method is suitable for measuring the specific heat of a small sample within certain error limit. It can be operated conveniently on simplified apparatus and realize the specific heat measurement with higher precision in a wider region cooperating with other methods.