This book constitutes the proceedings of the 25th RoboCup International Symposium which was held online during July 2022 in Bangkok, Thailand. The 28 full papers included in these proceedings were carefully reviewed and selected from 40 submissions; the volume includes 12 papers from the winners of the RoboCup 2022 competitions under the Champions Track. The RoboCup International Symposium focuses on the science behind the advances in robotics, including the key innovations that led the winning teams to their success, and the outcomes of research inspired by challenges across the different leagues at RoboCup.