The objective of this paper is to present the methodology of Systemic Environmental Impact Assessment (SEIA), developed by the undersigned through the PIGA Group of Research in Politics, Information and Environmental Management of the National University of Colombia, as a unique and innovative proposal for the protection of the environment, through the design, development and use of systematic tools, which allow a qualitative leap, both in the methods of evaluation of impacts by project promoters, and in licensing and monitoring processes by the environmental authority.The SEIA methodology is based on the process of "Systemic parametrization of the environmental dimension", which allows the collection, organization, systematization, aggregation and proper storing of the environmental information of a project, program, plan or policy, as an input basic for the design and development of a holistic, integral and systemic algorithm that optimizes the methodologies of environmental impact assessment, in the public-institutional, economic, social and environmental context of each country.