Abstract: The reflectance spectra were measured of some featured crops and typical vegetation with the ASD Handheld FieldSpec spectrometer
FR2500 in Gansu province． By the computer programming technology，the spectra database of typical ground objects in northwest
China was set up． This paper mainly introduces spectrum data collection，the establishment course of database system，application
and problems of database．

A test on the soil moisture monitoring with the CE312 thermal infrared radiometer and (:E313 visihle and near infrared ometers was(onduc;ted at Xifeng Agrometeorologic;al Experimental Site on the loess plateau in the east part of Cansu province ra

In this paper.some research advances on drought monitoring method by remote sensing are introduced. meanwhile.some　ｖiews are pointed out and indicated that the drought monitoring should carry out a new way which combine many subjects in the　future．