Abstract: Long-period ground motion(LPGM) can lead to long duration vibration and even damage or collapse of structures and infrastructure with long natural vibration period. With the emergence of flexible structures such as high-rise buildings and large oil tanks in our country, it is urgent to effectively prevent the LPGM damage. However, the construction of the National Intensity Rapid Reporting and Early Warning Project does not involve the early warning and related information release of LPGM. Therefore, this paper will introduce in detail the construction process of Japan's LPGM business system, the proposal of the construction of the business system, the development and improvement process of the business system. The key technologies involved in the construction of business system are described, such as the determination of the LPGM class and the establishment of LPGM prediction technology. Then it summarizes the application of its LPGM business system and the research and development of supporting disaster reduction facilities. Finally, according to the construction experience of Japan's long-period ground motion service system, " Observe business in the first, then predict technology following, predict business in the last", some suggestions are given for the construction of China's long-period ground motion service system in the future