The Twenty-second Session of the Scientific Advisory Committee (SAC22) of the Acid Deposition Monitoring Network in East Asia (EANET) was organised virtually from 18-20 October 2022. The meeting discussed acid deposition monitoring activities of the EANET in 2021 including project proposals submitted by NC and Participating Countries. Over 50 participants including the Scientific Advisory Committee members or their representatives from the EANET Participating Countries, Network Center, and the Secretariat joined the meeting. The meeting reviewed the progress of the acid deposition monitoring activities of EANET in 2021 including the adoption of the data report for 2021, acknowledgment of the recommendations of the working group, report on the Inter-laboratory Comparison (ILC) Projects 2021, updates on the National Monitoring Plans of the Participating Countries, revision of the Task Forces, and the work program and budget for 2023. At the meeting, the SAC members were invited to share their comments and suggestions on each agenda item. The AIT RRC.AP actively participated and greatly supported in organization of the EANET SAC22 meeting. More information is available on the EANET website.