We look forward to welcoming you to join the 4th Asia Oceania Mass Spectrometry Conference & 10th Taiwan Society for Mass Spectrometry Annual Conference (4th AOMSC & 10th TSMS Annual Conference), which will be held at Taipei International Convention Center (TICC) in Taipei on July 10-12. The conference will consist of 2 plenary lectures, three parallel oral sessions , over 50 invited lectures, workshops, and hundreds of poster. The panel will also honor awards to encourage potential young scientists. 　　The visitors can enjoy the famous scenes, historic spots, and Taiwan hospitality. We have more than 200 mountains and unique landscapes, including the Jade Mountain and the awesome Taroko Gorge. There are also many memorial halls and museums around the island, including the National Palace Museum that is listed as one of the five top museums in the world. We look forward to your participation at this conference.