Social impact assessment(SIA)is a methodology and technical mean applied in investment or appraisal institutions to evaluate the comprehensive benefit,effect and outcome of social factors related to the engineering projects.The technical mean is matured from the point of measure, Social impact assessment (SIA) is a methodology and technical mean applied in investment or appraisal institutions to evaluate the comprehensive benefit, effect and outcome of social factors related to the engineering projects. Technicality is matured from the point of measure,