Water scarcity has always been a severe problem for agricultural purposes in Cyprus. Meteorological data refer to the problem since their existence. The authorities, responsible for this environmental, social and economic constraint, have managed a great development and deployment of a dam's network in order to save water from losses and use it during low rainfall years. Lately, Cyprus is facing a period with very low rainfall which has caused curtailments to irrigation water schedule, which in turn has resulted to very low or no yield for the seasonal and multiannual crops. The monitoring of agricultural areas in Cyprus provides important data for efficient water supply plans and for avoiding unnecessary water lost due to inefficient irrigation. Thus, the monitoring through Satellite Remote Sensing is an essential and useful tool to provide irrigation data for water demand management. There is a need for an effective method of establishing crop water use in large irrigation projects so that crop demand can be accurately met by supply in order to eliminate problems such as lack of up to date information on the cropped area, evaporative demand in the agricultural fields and water supply. The project aims to the sustainable use of irrigation water from both the competent authorities and the producers. The wise and sustainable use of irrigation water will result to higher efficiency and will increase the water reserve funds for the future generations. Sustainable use of irrigation water will preserve the agricultural activity alive. The aim of this paper is firstly to assess and apply some of the existing methods of determining the evapotranspiration and secondly to present our novel methodology. Indeed the novel approach consists an integration of the following: remote sensing data, meteorological data, in-situ spectroradiometric, sunphotometer measurements and micro sensor technology.