| The drought has already become a widespread problem of the world. The frequent occurrence of drought has become one of the heavy natural disasters around the world. Drought has severely affected the production, the living environment, and the sustainable social development. Researching on drought and mastering the regulation of time and space variety,have important meaning on preventing drought, reducing the lose caused by drought, enhancing the agriculture development, promoting economy growth, and accelerating the society progress.In this study,the technology of ground monitoring and remote sensing for drought based on current research of drought are dissertated in detail. At first,three kinds of ground drought monitor index: the percentage rainfall apart from even,standard precipitation index number and comprehensive dry index number, which are usually used in meteorological business,are analyzed to display the distribution of time and space of the drought degree in the North of Xinjiang. Secondly, the response degree and fitness of three kinds of index numbers to the drought are analyzed, and the drought index which is fit of the north of Xinjiang is fixed on with the analysis. Thirdly, the method of identifying cloud, snow and the water is proposed by processing the MODIS data. Fourthly, a new method that building dirfferent model according to every pix is advanced. A synthetical model of drought monitoring by remote sensing, which combining thermal inertia and water supply index of plant, is created. The model is tested, and the results display that it has certain accuracy within the scope of error margin. Finally, remote sensing synthtical model and ground drought monitor index are applied to analyze the degree of drought in the north of Xinjiang in 2008. The results display that drought, which starts in April, gets most serious in June and ease in September, is severe in north region of Xinjiang in 2008. A drought relief strategy is also briefly proposed for this situation.
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