U-IT based technologies are being used in all areas including health, medical care, distribution, transportation, fisheries and agriculture. In relation to these information communication technologies, fusion technologies between IT and traditional industries are rising as a new topic. However, it is true that U-agriculture does not benefit compared to other industries in terms of the improvement of the quality of life through ubiquitous computing. In this paper, a greenhouse environment monitoring system was proposed that would store greenhouses' environment information in DB, compare and analyze optimum growth environment information with items desired by users using linear regression analysis and DIF analysis to manage crop growth environments in real time. This system provided continuous monitoring of optimum growth environments without users' firsthand visiting to greenhouses and thus the efficiency of agricultural product cultivation has been improved as agricultural products were protected from natural disasters.