The Seventh East Asia Accelerator Mass Spectrometry (EA-AMS-7) will be held in Guangxi Normal University, Guilin, China, from November 20th to 25th 2017, the Eleventh Anniversary of the first Symposium. Since the first Conference occurred at Tsukuba in 2006, there have now been six further symposiums on the development and applications of AMS in various fields include new facilities, future Ion sources, advances in AMS techniques, reference material, preparation and analysis of small samples, cosmogony isotopes, etc. Now, it is our pleasure to invite all colleagues working on AMS related fields to EA-AMS-7. All subjects on AMS and its applications are welcome to be presented in the symposium. The conference is sponsored by the following Companies: Seven stars Accelerator Mass Spectrometry Co., Ltd; National Electrostatics Corporation (NEC) Co., Ltd; Ionplus AG. Co., Ltd Hakuto Co., Ltd.