CO2 causes the global issues on climate change and global warming. The main sources of this gas are from energy consumption such as power plants and natural gas processing. The absorption technology with amine solution of 2-(Diethylamino)ethanol (DEAE) is a promising method to remove CO2 from these processes. To calculate the basic parameters such as diffusivity and the flow of fluids and to design the absorption equipment, the fundamental properties such as the density and the viscosity are needed to be measured. Therefore, the objective of this work is to measure the density and viscosity of the aqueous solution of DEAE over the entire concentration range from 0-1 mole fraction and the temperature ranging from 30-80 °C. The results present that the densities of DEAE decrease with an increase in mole fraction and temperature of solution. Also, the viscosities of all ranges of mole fraction of DEAE decrease as temperature increases. However, the viscosities increase with mole fraction of DEAE up to 0.4 and become lower. Furthermore, the correlations of the Redlich-Kister equation, the Wilson model, the Grunberg and Nissan equation and Chauhan polynomial equation have been applied to represent the results and to predict the data for the equipment design. Among them, the Redlich-Kister equation is the most suitable model to represent the results with the lowest percent average absolute deviation (%AAD) with 0.1590 % and 1.9413 % for density and viscosity.