The electricity consumption in residential sector is mainly focused on the lighting and domestic appliances. The efficient using of the electricity in houses is still a neglected issue, missing both the necessary statistic data and the methodologies and tools for assessing, prognosis and training the specialist and consumers. The aim of CREFEN project is to achieve, at the current level of the European researches in the filed, an integrated software system able to meet the requirements mentioned above. A method generally used is that of determining the needs of electricity for residential sector integrated with the final total energy needs of the sector. As a result, the potential for electricity saving in the residential sector can be analyzed only taking into consideration the potential of total energy saving in the sector. The electricity consumption in the year 2025 in the residential sector is estimated on the basis of macroeconomic and demographic scenarios. The software applications (modeling, designing and elaboration of the software) are focused on the applications concerning the power efficiency and electricity saving in residential sector (consumption assessment and prognosis methodologies, consumption scenarios, guidance of the consumers to the advanced technologies, and sustainable electricity management). The system integrates the economical, social and environment impact, as well. A special issue is to develop, using the market surveys and questionnaires, the necessary databases of equipment and endowments from residential sector. The experts and consumers training is performed in a large range of activities: web-based system with databases, electronic card, workshop, leaflet.