Inspired by the goals 6, 7 and 12, belonging to the 17 Sustainable Development Goals established by the United Nations (UN) in 2015, where the 6 goal:—Guarantee the availability and sustainable management of water and sanitation for all, the 7 goal:—Affordable and clean energy and the 12 goal:—Responsible consumption and production has developed this research, which aims to improve water efficiency and consequently energy efficiency in an irrigation system for landscaped. To properly implement efficiency measures, a study of current consumption and soil moisture is necessary, which will be conducted through monitoring at Campus 2 of the Polytechnic University of Leiria. This monitoring will occur in multiple phases to acquire records of soil moisture evolution and meteorological data collection is also conducted for rainfall and temperature forecasting. Several sensors’ devices will be installed outside building D in the west direction. With data readings from these sensors and collected meteorological data, a database will be created in the automation system (Phoenix Contact) to process this information from irrigation system control. Knowing the minimum value of soil moisture necessary to maintain a healthy garden, it is feasible to develop an algorithm to automate the process, consuming only the water necessary to reach this minimum level of humidity, making Campus 2 more sustainable by consuming less water and consequently less energy, resulting from shorter operating time of water pumps.