Although the frequency and intensity of drought has been increased with global warming,the response mechanism of ecosystem to drought remains unknown. In order to investigate the global responses of the eco-system to drought,the crown canopy ecosystem in Yuanjiang savanna was targeted as a case study. A integrated rainfall interception experiment platform was designed and placed over the crown for performance testing at 4 selected scenarios: blank (CK),30% interception (PE3),50% interception (PE5) and 70% interception (PE7),each of them with 3 repeated trials. By examinations of the responses of soil moisture and temperature to the given rainfall under each of the four interception conditions,an evaluation was performed on the water control effects of the platform,whereby it provide new insight into the response of canopy ecosystem in savanna to drought. Results found that annual temperature average in Yuanjiang had increased for years (P < 0.05) along with a gradual decrease in precipitation (P > 0.05) and the annual maximum temperature disclosed the fastest ascending rate (P< 0.05). In the four testing scenarios of CK,PE3,PE5 and PE7,the annual average of soil moisture contents at 10cm were 17.2%,12.9%,10.3% and 9.1%,respecitively,and they presented significant difference in dry season,rainy season and a year basis (P < 0.01). Soil temperature at 10cm deep in each of the four scenarios increased accordingly at 25.1 ℃(CK), 25.2 ℃(PE3), 25.8 ℃(PE5) and 26.5 ℃(PE7). Regardless of the dry season,rainy season or a whole year,in PE7 the temperature of soil was found an great difference as compared with values to be observed in PE3,CK (P < 0.05),whereas at other scenarios they exhibited less. The integrated water controlling efficiency achieved by rainfall interception platform installed above the crown (EPE,70% ~ 84%) was proved to be better than those of the regular platforms to be seated under crown canopy (EPE≤35.0%). In conclusion,our suggested platform could provide an acceptable approach to investigation of the response of entire ecosystem to drought.