gives the steps involved in determining the future energy demand of the Thai industrial sector. The first step in carrying out the research study is to collect the past time-series data with relation to the value added by each industrial sub-sector in the past years. In addition to this the population data, along with the energy consumed by each sub-sector for the past years are also collated. The energy demand projection has been carried out using regression analysis. The population and value added for each industrial sub-sector from 1990 to 2010 [4] have been used as independent variables and the relationship of the energy consumed by each sub-sector from 1990–2010 [40] is obtained as a regression equation which is related to these independent variables.