The main objective of this study is to enhance the heat and transfer process of absorption using the nanofluids as the working medium. Carbon nanotubes-ammonia nanofluids (the binary nanofluids) are prepared. The thermal conductivity of the binary nanofluids and the bubble absorption process enhancement are examined experimentally. The results show the thermal conductivity of the carbon nanotubes-ammonia nanofluid is higher 16% than that of $NH_3/H_2O$ solution. And the carbon nanotubes-ammonia nanofluid has a great enhanced effect to the $NH_3/H_2O$ absorption.