The authors introduce the multi-component seismic monitoring system AETA (acoustic & electromagnetic testing all in one system). The results of experiments in Yunnan, Sichuan, Tibet, Hebei, Beijing and Guangdong prove that the system AETA has the proper sensitivity with low cost and is easy to be installed. Meanwhile, the raw data and feature data refined from raw data have a good indication of earthquake. More subsequent experiments will be organized in west of China, capital circle of China and Taiwan Strait for deep research on effect of prediction.