This is a staged registry study of early treatment strategy management of acute aneurysmal subarachnoid hemorrhage(aSAH) among different economic development levels areas in China. First stage, the study will investigate and register the basic information of emergency treatment management for the acute aSAH in 20 different grade centers located in different economic levels districts including Northeast part, Northern, Eastern, South-central, Northwest, Southwest and Qinghai-Tibet of China. Comparing the the outcome of acute aSAH to find the critical factors to affect it by statistical analysis. Then,the investigators will offer some suggestions to adjust the measures to improve the efficacy of emergency medical service for acute SAH. Second stage, to evaluate the outcome after applying the new suggestion of self-control methods. The investigators hypothesis that there is an appropriate green pathway in different districts to shorten the rescuing time, improve the curative effects.