This article shows the results of an applied investigation aimed to establish a general design methodologyfor the modernization of automated systems oriented to modernization of physical and technological infrastructureof the “Servicio Nacional de Aprendizaje” (SENA) in Colombia, with systems, equipment and applicationsoriented to sustainability, efficiency and energy savings. The objective of this work is to "Propose amethodology for the conceptual design of automated building systems". The methodology was applied to thedesign of the automated system of the Technological Services Laboratory (LST) of the Center for Electricityand Industrial Automation (CEAI)- SENA and its implementation constitutes a reference model for the otherSENA training centers to apply in order to improve the conditions of safety, comfort and energy managementin their facilities.